Calzone vs Stromboli: Folded Pocket or Rolled Spiral?

The difference is construction. A calzone is folded and a stromboli is rolled, and that decides how the filling sits: one pocket in a calzone, a spiral of dough and filling in a stromboli. They also come from different places, and the history of each is worth knowing before you argue about which is which.

The calzone: a folded Neapolitan pizza

The calzone is Neapolitan and old. Modernist Pizza’s timeline of written references to pizza finds its first mention in an 1847 book on Naples, Napoli in Miniatura. The name means a large stocking: the Treccani Italian dictionary gives it as an augmentative of calza. Treccani describes the Neapolitan calzone as bread dough rolled into a thin disc and folded in two around mozzarella, prosciutto and salami, baked or fried, and sometimes served with tomato sauce.

It’s still part of the Neapolitan canon. The AVPN, the Naples association that sets rules for Neapolitan pizza, lists the baked ripieno or calzone among its traditional pizzas. Its version spreads ricotta, loosened with a spoonful of water, over half a disc of dough, adds salami cut in strips, pepper, grated cheese and a little oil, then folds the dough over, with a little tomato and grated cheese on the outside. The rules note that it bakes longer than a flat pizza because it has to be “dried out.” The AVPN also describes a fried calzone, sealed with the side of the hand and fried in hot oil. Southern Italy has other relatives: Treccani lists a Puglian calzone filled with anchovies, tomato and onion, and the panzerotto of Puglia and Campania, fried or baked.

How it’s built. Pat or roll the dough into a round, put the filling on one half, leave a clean border, fold the other half over and seal the edge. King Arthur Baking’s published calzone does exactly that, then cuts 3 or 4 slits in the top to release steam. Its bakers’ advice is not to overfill: about a generous cup of filling per calzone, because a calzone should be thin.

The stromboli: a rolled Italian-American loaf

The stromboli is American. Romano’s Pizzeria in Essington, Pennsylvania, near Philadelphia, credits Nazzareno Romano with introducing it there in 1950. According to The Philadelphia Inquirer’s 2014 account of the family’s story, the first one was ham, cotechino salami, cheese and peppers baked in a bread-dough pocket, and the name came from his brother-in-law, after Stromboli, the Ingrid Bergman film whose off-screen scandal was in the news. The same article notes a rival claim from Spokane, Washington, where Mike Aquino of Mike’s Burger Royal sold a “stromboli” from 1954, though his was a sandwich: capicola and provolone in an Italian chili sauce on a French roll. Romano’s disputes it. America’s Test Kitchen describes the stromboli as a relative of the calzone that originated in Philadelphia.

How it’s built. Roll the dough into a rectangle, layer the filling over it with a border, roll it up from a long side, pinch the seam and ends, and bake it seam side down. America’s Test Kitchen’s version also brushes the border with egg wash before rolling, so the seam sticks.

Spinach-ricotta calzones

This follows King Arthur Baking’s published recipe (checked October 14, 2026). It makes two calzones of about 12 inches. The yeast and salt are given by volume, as King Arthur gives them; the grams beside them are our approximate conversions for instant yeast and table salt, from King Arthur’s ingredient weight chart.

Dough

King Arthur says to use less water in summer and more in winter, aiming for a soft dough.

Filling (about 2 cups, so about a cup per calzone)

Optional, for the top: tomato or pizza sauce and shredded mozzarella.

Method

1. Make the dough. Mix and knead the flour, yeast, salt, oil and enough water for a soft, smooth dough.
2. Rise. Cover and let it rise until nearly doubled, about 2 to 2½ hours.
3. Shape. Gently deflate the dough and cut it in half. Pat each half into a 10- to 11-inch circle on parchment rated for 450°F or a lightly greased baking sheet.
4. Fill. Mix the filling. Spread half of it over half of each circle, fold the bare half over and crimp and press the edges to seal.
5. Vent. Cut 3 or 4 slits in each top to release steam. Brush with olive oil, or spread a thin layer of pizza sauce on top and sprinkle with shredded cheese.
6. Rest and heat the oven. Leave the calzones uncovered for 30 minutes while the oven heats to 450°F (230°C).
7. Bake 18 to 22 minutes, until golden brown.

Time: about 15 minutes of active work and about 3 hours in all, mostly the rise.

Spinach is the wet ingredient here, which is why it’s cooked and squeezed dry first. The same goes for other watery vegetables; see pre-cooking pizza toppings.

Salami, capicola and provolone stromboli

This follows America’s Test Kitchen’s published recipe (checked October 14, 2026). It makes one stromboli, enough for two. The gram weights are converted from its ounces.

Ingredients

• 227 g (8 oz) pizza dough, at room temperature
• 57 g (2 oz) thinly sliced deli salami
• 57 g (2 oz) thinly sliced deli capicola
• 57 g (2 oz) thinly sliced deli provolone
• ¼ cup jarred roasted red peppers, rinsed, patted dry and thinly sliced
• ¼ cup grated Parmesan
• 1 large egg beaten with 2 tablespoons water, for the egg wash
• 1 teaspoon sesame seeds
• Vegetable oil spray

Method

1. Heat the oven to 400°F (200°C) with a rack in the middle, and spray a rimmed baking sheet with oil.
2. Roll out the dough on a lightly floured counter into a 10 by 7½-inch rectangle, about ¼ inch thick, with a long side facing you.
3. Fill. Layer the salami, capicola and provolone over it, leaving a ¾-inch border. Top with the peppers and Parmesan, and brush the border with some of the egg wash.
4. Roll. Starting from the long side nearest you, roll the dough tightly into a log. Pinch the seam and both ends closed.
5. Finish. Set it seam side down on the sheet, brush with the rest of the egg wash and sprinkle with the sesame seeds.
6. Bake covered loosely with greased foil for 15 minutes, then uncovered for about 20 minutes more, rotating the sheet halfway, until golden.
7. Rest on a wire rack for 5 minutes before slicing.

America’s Test Kitchen says to pat the peppers dry so they don’t make the stromboli soggy, and to let cold dough warm up while you prepare, because it’s hard to roll. Serve tomato sauce on the side if you like.

Making the dough

Both recipes work with ordinary pizza dough. King Arthur’s calzone uses its own soft olive-oil dough, above; America’s Test Kitchen’s stromboli takes 8 ounces of store-bought or homemade dough. If you make your own, the same-day dough or the overnight dough will do.

The Pizza Planner can work out the grams and the fermentation schedule for an alternative overnight dough. It plans open pizzas, though, and two of its 12-inch balls won’t necessarily match the dough either recipe uses, so follow the recipes above for the filling, the portion size and the bake.

Folded and rolled pizzas turn up in other traditions, too: Old Forge’s “white” pizza is a double-crust tray pie, covered in Old Forge-style pizza.

Sources

• King Arthur Baking (PJ Hamel), “Spinach-Ricotta Calzone”, updated July 8, 2022. Checked October 14, 2026.
• America’s Test Kitchen, “Salami, Capicola, and Provolone Stromboli”, February 16, 2022. Checked October 14, 2026.
• Nick Vadala, “The stromboli: A Philly original, courtesy of Romano’s”, The Philadelphia Inquirer, June 17, 2014. Checked October 14, 2026.
• King Arthur Baking, Ingredient weight chart (instant yeast and table salt conversions). Checked October 14, 2026.
• Romano’s, In the news (Nazzareno Romano and 1950). Checked October 14, 2026.
• Treccani, Vocabolario: “calzone” and “panzarotto”. Checked October 14, 2026.
• Associazione Verace Pizza Napoletana: International Regulations (Disciplinare), English edition, articles 2.3, 4.2 and 4.3.2 (baked and fried calzone). Checked October 14, 2026.
• Nathan Myhrvold and Francisco Migoya, Modernist Pizza (2021), volume 1, page 11 (timeline: the 1847 first mention of calzone).