Roman Pizza

Roman Pizza

Introduction

Roman pizza, specifically the iteration known as pizza al taglio (pizza by the slice) and its more rectangular cousin pizza in teglia (pizza in a pan), represents a distinct category within the broader spectrum of Italian flatbreads. Originating in Rome, Italy, this style is characterized by its typically rectangular or square shape, a focaccia-like dough base that is often thicker and airier than Neapolitan pizza, and a wide array of toppings applied after or during the initial baking phase. Its cultural significance lies in its evolution from a simple, accessible food for the working class to a ubiquitous offering in pizzerie al taglio, bakeries, and even as a home-prepared meal, reflecting the urban culinary landscape of Rome.

Quick Facts

History and Cultural Background

The antecedents of Roman pizza can be traced to ancient Roman flatbreads, such as focaccia, which were simple baked doughs seasoned with olive oil and herbs, often used as a vehicle for other foods or as a meal in themselves. However, the direct lineage of pizza al taglio and pizza in teglia as we recognize them today emerges much later, primarily in the 20th century in Rome.

The post-World War II era in Rome saw significant urban development and demographic shifts. The need for quick, affordable, and substantial meals for a growing urban population, particularly for workers and students, drove the development of new culinary formats. Bakeries (forni) and small food shops began offering baked goods that could be sold by weight or by the slice. This provided a practical and economical solution.

The exact genesis of pizza al taglio as a distinct entity is difficult to pinpoint to a specific date or individual. However, its popularization is strongly linked to the rise of forni in Rome that started selling rectangular pizzas baked in large metal pans. These pans, often around 40x60 cm, allowed for larger production volumes and a different dough hydration and baking profile compared to the round, Neapolitan-style pizzas, which were less common in Rome.

Initially, the toppings were often simple and dictated by seasonal availability and local produce. Olive oil, tomato, garlic, oregano, and anchovies were common. As Roman cuisine evolved and global influences increased, so did the variety of toppings. The crucial element that distinguished this style was its accessibility. Unlike earlier forms of pizza that might have been considered more of a sit-down meal, pizza al taglio was designed for consumption on the go or as a quick, informal meal. It became a staple in Roman street food culture.

The pizza in teglia variant, baked in a deep rectangular pan, allowed for a thicker, more bread-like crust, often with a crisp bottom and a soft, airy interior. This was ideal for absorbing moisture from richer toppings and sauces. Pizza al taglio, while often derived from a similar dough, is typically baked in thinner, shallower pans or directly on the oven deck, resulting in a thinner, crispier base when sold by the slice. Over time, pizza al taglio has become one of the most recognizable and consumed forms of pizza in Rome, with dedicated establishments solely focused on this format. Its flexibility in shape, size, and topping allows for immense creativity, making it a dynamic and ever-evolving aspect of Roman culinary identity.

Core Characteristics

Crust & Dough

The defining characteristic of Roman pizza styles (al taglio and in teglia) is its dough, which diverges significantly from the lighter, more elastic dough of Neapolitan pizza. The dough is typically characterized by a higher hydration level, ranging from 70% to 85%. This elevated water content, combined with specific flour types and extended fermentation, contributes to a distinctive crumb structure.

In pizza in teglia, the dough is usually pressed or spread into a well-oiled rectangular baking pan. Upon baking, this results in a crust that is often thicker, possessing a substantial interior crumb that is both tender and airy, reminiscent of focaccia. The exterior develops a pleasing crispness, especially on the bottom, due to direct contact with the hot pan and oven deck. The cornicione (rim), while present, is generally less pronounced and airy than in Neapolitan pizza. It is often softer and chewier, offering a textural contrast to the crisp base and tender interior.

For pizza al taglio, the dough might be baked in thinner pans or sometimes directly on perforated baking sheets or oven decks. While still often high in hydration, the final crust can be thinner and exhibit greater crispness throughout. The internal structure can range from a focaccia-like crumb to a more cracker-like consistency, depending on the specific hydration, flour used, and baking parameters. Regardless of thickness, the ideal crumb structure is characterized by irregular, open air pockets.

Texture & Appearance

Roman pizza presents a visually distinct profile due to its rectangular or square shape, a departure from the circular pizzas common elsewhere. The surface is typically adorned with a broad spectrum of toppings, applied with a less stringent tradition than in Naples. The crust can exhibit a range of textures: from a robust, focaccia-like chew with a crispy exterior and bottom in pizza in teglia, to a thinner, more uniformly crisp base in pizza al taglio.

The color of the crust ranges from golden brown to a deeper, toasted hue, especially at the edges and bottom, indicating significant caramelization and Maillard reactions. The crumb, when visible in a cross-section, reveals an open, irregular network of air cells, a testament to proper hydration and fermentation. The overall mouthfeel is one of satisfaction, with a balance between the crisp exterior, the tender interior, and the chosen toppings. The oil content in the dough, and often from generous oiling of the pan, contributes to a moistness that prevents excessive dryness, even in thinner versions.

Baking Style

The baking method for Roman pizza is a critical factor in achieving its characteristic texture. Typically, these pizzas are baked in deck ovens, which can be either static or convection. The high heat and direct contact with the oven floor (deck) or a hot baking pan are crucial.

For pizza in teglia, the pizza is baked in a pre-oiled pan. The pan is often placed directly on the oven deck or a lower rack to ensure thorough bottom heat. The baking temperature is generally moderate to high, ranging from 220°C to 260°C (425°F to 500°F). The total bake time can vary significantly, from 15 to 30 minutes or even longer, depending on the thickness of the dough, the moisture content of the toppings, and the oven's performance. The goal is to cook the interior thoroughly, achieve a crisp bottom crust, and melt/cook the toppings without burning them.

Pizza al taglio may be baked at higher temperatures, similar to Neapolitan pizza (up to 485°C or 905°F in specialized ovens), but often in conventional ovens at temperatures between 230°C and 260°C (450°F to 500°F). The shorter bake times, typically 8-15 minutes, are facilitated by the thinner dough and toppings. In some commercial settings, particularly for pizza al taglio, convection ovens are employed to ensure even heat distribution and a consistent bake, especially when dealing with numerous rectangular pans. The use of perforated pans can also aid in heat circulation and crisping the base.

Traditional Ingredients

The ingredient selection for Roman pizza is guided by principles of flavor integration and textural balance, with a notable emphasis on high-quality, fresh components.

Dough:

• Flour: Typically, a strong bread flour with a protein content between 12% and 14% is utilized. This high protein content is essential for developing a strong gluten network capable of retaining the high hydration levels and withstanding extended fermentation periods. Italian Type "0" or "00" flours are also common, but often those with higher W values (a measure of flour strength) are preferred over softer "00" grades often used for Neapolitan pizza. The specific ash content (mineral content) can influence flavor and browning.
• Water: High hydration is a hallmark. The water temperature is carefully controlled during mixing, typically between 18°C and 22°C (64°F and 72°F), to manage dough temperature and fermentation speed.
• Yeast: Fresh yeast (lievito di birra fresco) or active dry yeast is used. The quantity is significantly reduced for long fermentation, relying on time and temperature to develop flavor and structure. Sourdough starter (lievito madre) is also increasingly employed, particularly in artisanal renditions, adding complexity and a subtle tang.
• Salt: Essential for flavor and gluten structure, typically at 1.8% to 2.5% of the flour weight.
• Fat: Olive oil is almost universally incorporated into the dough, contributing to tenderness, flavor, and a crispier crust. Quantities typically range from 3% to 8% of the flour weight.

Sauce:

• Tomato: For simpler pizzas, San Marzano or Roma tomatoes (crushed or pureed) are often used. However, unlike Neapolitan pizza, the sauce is not always applied as a distinct layer of pure crushed tomatoes. Sometimes, cooked tomato sauces seasoned with olive oil, garlic, and oregano are used. In many pizza al taglio preparations, the tomato sauce is applied more sparingly or is a component of a larger topping mosaic.

Cheese:

• Mozzarella: Fior di Latte (cow's milk mozzarella) is the predominant choice. Its lower moisture content and less stringy melt profile compared to buffalo mozzarella are advantageous for the higher baking temperatures and longer bake times, preventing the pizza from becoming too watery. When used, it is typically low-moisture mozzarella, often shredded or diced to ensure even melting.
• Other Cheeses: Pecorino Romano or Parmigiano-Reggiano can be used as finishing cheeses or incorporated into toppings for added sharpness and depth of flavor.

Toppings:

• Vegetables: A wide variety of seasonal vegetables are common, including zucchini, eggplant, bell peppers, onions, potatoes (thinly sliced and pre-cooked), artichokes, and mushrooms.
• Meats: Cured meats like prosciutto cotto (cooked ham), salsiccia (sausage), and pancetta are frequently used.
• Seafood: Anchovies, tuna, and sometimes shrimp are found on Roman pizzas.
• Herbs: Fresh basil and oregano are frequently added for aroma and flavor.

Application Techniques:

• For pizza in teglia, toppings are often layered on the par-baked or fully baked dough, or applied just before the final bake. The distribution is typically generous.
• For pizza al taglio, toppings are applied before baking, allowing them to cook and meld with the crust. The presentation is often visually appealing, with contrasting colors and textures.

Technical Dough Formulation

The formulation of Roman pizza dough hinges on achieving a high degree of extensibility and gas retention, facilitated by high hydration and a robust gluten network.

Flour Type:

• Target: Strong bread flour, typically Italian Type "0" or "00" with a high W value (300-380) and P/L ratio (0.5-0.7). Protein content should be between 12.5% and 14%. This ensures the dough can handle the high water absorption and extended fermentation without collapsing.
• Extraction Rate: Typically around 75-85% for refined flours (Type 0 or 00). Whole wheat or spelt flours, if used, would have higher extraction rates and require adjustments in hydration.

Hydration:

• Range: 70% to 85%.
  • 70-75%: Produces a more manageable dough, suitable for beginners or those using less powerful mixing equipment. The crumb will be less open but still tender and crisp.
  • 75-80%: Achieves the characteristic focaccia-like crumb in pizza in teglia. This level requires good gluten development and handling.
  • 80-85%: Yields the most open crumb structure and a very tender interior but is challenging to handle and requires precise fermentation control.

Water Temperature:

• Target: 18°C to 22°C (64°F to 72°F). This is crucial for controlling the dough's final temperature. A lower dough temperature (around 23-25°C or 73-77°F) is desirable for long, slow fermentation, especially cold fermentation. Warmer water can accelerate fermentation, which is counterproductive for developing complex flavors and an open crumb over extended periods.

Fermentation:

• Mechanics: Extended fermentation is paramount. This typically involves a combination of bulk fermentation at room temperature followed by a prolonged cold fermentation in the refrigerator.
  • Bulk Fermentation: 2-4 hours at ambient temperature (20-24°C or 68-75°F), allowing the yeast to begin activity and gluten to relax.
  • Cold Fermentation: 24 to 72 hours at 4°C (39°F). This slow, controlled fermentation develops complex flavors through enzymatic activity and the production of esters and other aromatic compounds. It also improves dough extensibility and gas retention.
• Preferments: While not strictly mandatory for all Roman pizza, techniques like biga (a stiff preferment) or poolish (a wet preferment) can be employed with strong flours to enhance flavor and texture, especially when aiming for a shorter ambient fermentation followed by a cold rest. Wild yeast cultures (sourdough) can also be used, contributing a characteristic tang and a more complex microbial ecosystem.

Yeast/Leavening Agent:

• Quantities: For long, cold ferments (48-72 hours), yeast quantities are very low, often 0.1% to 0.5% of the flour weight for commercial yeast. If using active dry yeast, it may be rehydrated first. Sourdough starter usage will vary depending on its activity and hydration.

Salt:

• Percentage: 1.8% to 2.5% of the flour weight. Crucial for flavor and strengthening the gluten matrix.

Fat (Olive Oil):

• Percentage: 3% to 8% of the flour weight. Added towards the end of mixing or after initial gluten development. Contributes to dough softness, flavor, and crust crispness.

Baking Temperature:

• Pizza in Teglia: 220°C to 260°C (425°F to 500°F). Baking in a pan on the deck or lower rack.
• Pizza al Taglio (in shallower pans or on deck): 230°C to 260°C (450°F to 500°F) in conventional ovens, or up to 485°C (905°F) in specialized pizza ovens for a quicker bake.

Step-by-Step Preparation Process

This process outlines the preparation of pizza in teglia, known for its focaccia-like crumb and crisp bottom.

1. Ingredient Scaling: Precisely weigh all ingredients according to the chosen formulation. For example, for 1 kg of flour at 80% hydration: 1000g flour, 800g water, 20g salt, 50g olive oil, and a small amount of yeast (e.g., 2-5g fresh yeast or 1-2g active dry yeast for a 48-hour cold ferment).
2. Mixing:
   • In a stand mixer with a dough hook, combine flour and water (approximately 90% of the total water) on low speed for 2-3 minutes until a shaggy dough forms. Let it rest (autolyse) for 20-30 minutes. This allows the flour to fully hydrate and gluten development to begin passively.
   • Add the salt, remaining water, yeast (dissolved if dry yeast), and olive oil.
   • Increase mixer speed to medium-low and mix for 8-12 minutes. The dough should start to pull away from the sides of the bowl, exhibiting good elasticity and becoming smoother. The target dough temperature should be around 24-26°C (75-79°F).
3. Bulk Fermentation:
   • Transfer the dough to a lightly oiled container. Cover tightly.
   • Allow to bulk ferment at room temperature (20-24°C or 68-75°F) for 2-4 hours. During this period, perform 2-3 sets of stretch-and-folds at 30-45 minute intervals. This technique strengthens the gluten network without overworking the dough. The dough should increase in volume by approximately 30-50%.
4. Cold Fermentation (Maturation):
   • After bulk fermentation, the dough is gently transferred to a lightly oiled, airtight container or divided into dough balls (if preparing individual pizzas or for better handling).
   • Place the container(s) in the refrigerator (4°C or 39°F) for a minimum of 24 hours, and ideally 48-72 hours. This slow fermentation develops complex flavors and improves dough structure.
5. Dough Tempering and Stretching:
   • Remove the dough from the refrigerator 2-3 hours before baking to allow it to temper and reach room temperature.
   • Generously oil a rectangular baking pan (e.g., 40x30 cm or 16x12 inches) with olive oil.
   • Gently place the tempered dough into the oiled pan.
   • Using oiled fingertips, gently press and stretch the dough outwards towards the edges of the pan. Avoid tearing the dough. If it resists, let it rest for 10-15 minutes and continue stretching. The goal is an even thickness across the pan.
6. Second Proof (Optional but Recommended):
   • Cover the pan and allow the dough to proof for another 30-60 minutes at room temperature. This allows for further relaxation and creates a slightly airier crumb.
7. Topping Application:
   • Preheat the oven to 230°C to 260°C (450°F to 500°F), with the baking rack positioned in the lower third of the oven.
   • If using a simple tomato sauce, spread a thin, even layer over the dough, leaving a small border for the crust.
   • Distribute toppings evenly. For pizza in teglia, toppings are typically applied before the entire bake. Ensure toppings are not excessively wet to prevent a soggy base.
8. Baking:
   • Place the pan directly on the oven deck or the preheated lower rack.
   • Bake for 15-30 minutes, depending on oven temperature and topping thickness. The crust should be golden brown, the bottom should be crisp and browned, and the cheese should be melted and bubbly.
   • For pizza al taglio baked directly on a deck or perforated pan, baking times might be shorter (8-15 minutes) at slightly higher temperatures.
9. Finishing and Serving:
   • Once baked, remove the pizza from the oven. Drizzle with a little more olive oil if desired.
   • Allow to cool slightly in the pan before transferring to a cutting board.
   • Cut into desired rectangular or square portions for serving.

Regional and Modern Variations

While pizza al taglio and pizza in teglia are strongly associated with Rome, their popularity has led to adaptations and variations across Italy and internationally.

Contemporary Artisanal Interpretations:

• High Hydration Focus: Many modern bakers are pushing the hydration levels even higher (over 85%) and employing very long fermentation periods (up to 96 hours) using sourdough starters. This results in an exceptionally light, airy crumb with large, irregular holes, often referred to as pizza in teglia "all'acqua".
• Flour Blends: Incorporating heritage grains such as spelt, kamut, or einkorn, often in blends with strong bread flours, to add nuanced flavors and complex textures.
• Olive Oil Variations: Using different grades of olive oil, or infusing oils with herbs, to impart specific flavor profiles.

Regional Adaptations:

• Northern Italy: In regions like Lombardy, pizza al trancio (slice pizza) often refers to a similar style, sometimes with a slightly denser crumb and a greater emphasis on local cured meats and cheeses.
• Southern Italy: While Neapolitan pizza dominates, Roman styles are present, often adapted with local toppings like Nduja (spicy spreadable pork sausage) or specific regional cheeses.

Fusion Styles:

• Globally, Roman-style dough is being used as a base for non-traditional toppings, blending Italian techniques with international culinary influences.

Comparative Analysis

This section contrasts Roman pizza (pizza in teglia) with three closely related pizza styles: Neapolitan, New York-style, and Sicilian pizza.

Hydration Variances: Roman pizza's significantly higher hydration (70-85%) compared to Neapolitan and New York-style (60-65%) is a primary differentiator. This higher water content necessitates stronger flour and longer fermentation to create a stable gluten network, leading to its characteristic airy crumb. Sicilian pizza, also high in hydration, shares this characteristic but often results in a more uniformly spongy texture due to its different baking profile and topping application.

Bake Profiles: The lower baking temperatures and longer bake times for Roman pizza in teglia are crucial for cooking the thicker dough through without burning the top. Neapolitan pizza's extremely high temperature and short bake time are designed to create rapid oven spring and characteristic charring. New York-style pizza occupies a middle ground, achieving a crisp bottom and pliable crust at moderate-high temperatures. Sicilian pizza's moderate temperature and longer bake allow its thick dough to cook through and develop a soft, bread-like consistency.

Final Structural Differences: The structural outcome is a direct consequence of hydration and baking. Roman pizza's high hydration and moderate bake yield a structure that is both crisp on the outside and tender/airy within, similar to focaccia. Neapolitan pizza is delicate and pliable, meant to be folded. New York-style pizza is structurally robust enough to be eaten folded but still retains flexibility. Sicilian pizza is the most bread-like, a dense yet airy foundation for rich toppings.

Common Execution Failures

Executing Roman pizza styles successfully requires precise control over several variables. Common failures include:

• Insufficient Gluten Development: Using flour with insufficient protein or inadequate mixing/stretch-and-folding leads to a dough that cannot hold its hydration.
  • Result: A dense, gummy, and flat crust with minimal air pockets. The dough may tear easily during stretching.
• Over-Proofing (Ambient or Cold): Extended fermentation beyond the optimal window can exhaust the yeast and enzymes.
  • Result: A collapsed dough that lacks structure. It may produce a strong, sour flavor that is not characteristic of the style. The crust can become overly wet or sticky.
• Under-Proofing: Insufficient fermentation time, particularly cold fermentation, fails to develop complex flavors and optimal dough structure.
  • Result: A dough that is tight and difficult to stretch. The final crust will be dense, less flavorful, and lack the characteristic open crumb.
• Incorrect Water Temperature: Water that is too warm during mixing can lead to excessively rapid fermentation, especially in the initial stages.
  • Result: Loss of control over fermentation, potentially leading to over-proofing or a crust with an undesirable texture and flavor.
• Pan Oiling Issues (Pizza in Teglia): Insufficient oil in the pan or oiling only the bottom without the sides.
  • Result: The dough may stick to the pan, resulting in an uneven crust and difficulty removing the pizza. The bottom crust may not achieve adequate crispness.
• Overloading with Toppings: Applying too many or excessively wet toppings.
  • Result: A soggy bottom crust and an undercooked interior. The flavors can become muddled, and the overall texture compromised.
• Oven Temperature Issues:
  • Too Low: The dough will not achieve sufficient oven spring or crispness, resulting in a pale, doughy crust.
  • Too High (for pizza in teglia): The exterior can burn before the interior is cooked, leading to a dense interior and burnt crust.
• Improper Stretching: Forcing the dough or stretching too aggressively.
  • Result: Tears in the gluten structure, leading to uneven thickness and potential blowouts or deflation during baking. This can also degas the dough prematurely.
• Enzyme Degradation (from excessive fermentation): Over-fermented dough loses its structural integrity.
  • Result: A weak, sticky dough that tears easily and produces a slack, unappealing pizza with a poor crumb structure.

Frequently Asked Questions

1. What is the primary difference between pizza al taglio and pizza in teglia?
   • Pizza al taglio is typically sold by the slice and can vary in thickness and crispness. Pizza in teglia is specifically baked in a pan and is characterized by a thicker, focaccia-like dough with a crisp bottom. Both are Roman styles.
2. Why is high hydration critical for Roman pizza dough?
   • High hydration (70-85%) is essential for developing the characteristic airy, open crumb structure and tender interior, similar to focaccia, which is a hallmark of Roman styles.
3. Can I make Roman pizza at home?
   • Yes. While professional ovens offer advantages, a standard home oven set to its highest temperature, combined with a good quality baking steel or pizza stone, can produce satisfactory results, particularly for pizza al taglio.
4. What type of flour is best for Roman pizza?
   • A strong bread flour with a protein content of 12.5-14% is recommended to withstand high hydration and extended fermentation. Italian Type "0" or "00" flours with high W values are also suitable.
5. How long should Roman pizza dough ferment?
   • Extended fermentation is key. This typically involves an initial bulk fermentation of 2-4 hours at room temperature, followed by a cold fermentation of 24-72 hours in the refrigerator.
6. What is the role of olive oil in Roman pizza dough?
   • Olive oil contributes to dough tenderness, flavor, and helps achieve a crisper crust. It is typically incorporated into the dough itself and used generously to oil the baking pan for pizza in teglia.
7. Is it possible to achieve Neapolitan char on Roman pizza?
   • Generally, no. The higher hydration, longer bake times, and lower oven temperatures used for most Roman styles do not promote the rapid oven spring and intense charring characteristic of Neapolitan pizza baked at extremely high temperatures.
8. How do I prevent a soggy bottom crust?
   • Ensure adequate oven preheating, use a hot baking surface (steel or stone), oil the pan properly for pizza in teglia, do not overload with wet toppings, and ensure sufficient baking time.
9. What are the most common mistakes when making Roman pizza?
   • Common failures include insufficient gluten development, improper proofing (under or over), incorrect water temperature, and oven temperature management.
10. Does Roman pizza use sourdough starter?
    • While traditional recipes often use commercial yeast, artisanal and modern Roman pizza often incorporates sourdough starter (lievito madre) for enhanced flavor complexity and a characteristic tang.

Related Styles

• Focaccia
• Pinsa Romana
• Pizza alla Pala
• Pizza Napoletana (for comparison of dough mechanics)
• Sicilian Pizza (Sfincione)

Authoritative Sources & Further Reading

• Bertinet, Richard. Dough: Simple Recipes for Artisanal Bread. W. W. Norton & Company, 2009. (Provides foundational principles of high-hydration doughs and gluten development applicable to Roman styles.)
• Dal Fiume, Massimo. La Scienza della Pizza. Chiriotti Editori, 2015. (Explores the scientific aspects of pizza making, including dough hydration and fermentation.)
• Kamman, Peter. The New World of Sourdough: Baking Translation and Stories from Around the Globe. Countryman Press, 2019. (Discusses sourdough fermentation techniques that can be applied to Roman pizza.)
• Lagumina, Antonio. Pizza Romana: Il Libretto del Maestro Paoletto. Editrice Il Capitello, 2016. (Specific to Roman pizza traditions.)
• La Piazza, Giuseppe. Arte Bianca: La Grande Tradizione della Pizza Napoletana. Phaidon Press, 2017. (While focused on Neapolitan, offers comparative insights into dough science and historical context.)
• McGee, Harold. On Food and Cooking: The Science and Lore of the Kitchen. Scribner, 2004. (Provides extensive scientific explanations of baking principles, yeast activity, and gluten formation.)