Roman Al Taglio (Pizza by the Slice)

Origin: Rome, Italy · Category: Regional Italian

High-hydration rectangular pizza sold by weight in Roman bakeries. Open airy crumb, light crispy bottom. Bonci-style. 80%+ hydration produces hole structure similar to focaccia, but thinner.

Baker's percentages

Hydration
80%
(7585%)
Salt
2.5%
Oil
3%
Sugar
Yeast type
instant dry
Yeast %
0.3%
Flour
00 flour
Protein target
13%

Example: 1000g flour scaled out

  • Flour: 1000g (00 flour)
  • Water: 800g
  • Salt: 25g
  • Olive oil: 30g
  • instant dry yeast: 3.00g
  • Total dough: 1858g

Fermentation + bake

Bulk (room temp)
1h
Cold ferment
48h
Ball rest
2h
Bake temp
525°F
Bake time
14–18 min
Vessel
rectangular sheet pan (teglia) lightly oiled

Technique

Long 48-72h cold ferment for flavor. Stretch by hand into oiled sheet pan; minimal handling preserves bubbles. Pre-bake base 5 min before topping. Cut with scissors after bake.

Source

Bonci Pizzarium — Gabriele Bonci method

For full step-by-step recipe with photos and shaping technique, follow the source link above. This page provides the formula for use with the hydration calculator.

Related references on this site

The gear that makes the math work

A short, honest baking kit. The scale matters most — every weight on this page is in grams. The Dutch oven is what turns a good crumb into a great crust.

  • Digital kitchen scale (0.1 g)

    Baker's percentage is by weight, not volume — a 0.1 g scale is what makes the math on this page accurate.

    View on Amazon →
  • Dutch oven / combo cooker

    Traps steam for the first bake phase — the single biggest factor in oven spring and a blistered, glossy crust.

    View on Amazon →
  • Banneton proofing basket

    Wicks moisture and holds shape during the final proof, so high-hydration dough doesn't spread flat.

    View on Amazon →
  • Bread lame + bench scraper

    A sharp lame scores clean ears; a steel bench scraper handles wet, sticky dough without tearing the gluten.

    View on Amazon →
  • High-protein bread flour

    The math assumes ~12–14% protein. Real bread flour absorbs the hydration you calculate — all-purpose won't.

    View on Amazon →
  • Danish dough whisk

    Mixes shaggy, high-hydration dough in seconds without the gluey mess of a spoon or your hands.

    View on Amazon →
🎧 Or learn the craft by ear

The numbers here are the what; a good baking book is the why. An Audible trial gets you any title free — Michael Pollan’s Cooked(the “Air” chapter is the best story ever told about why bread rises) is a perfect first listen.

Start a free Audible trial →

As an Amazon Associate, SourdoughHydration earns from qualifying purchases at no extra cost to you. More on how this is funded.