Modern Science · Regional Recipes · From the Sea

Focaccia: The Science-First Version

Open, custardy crumb. Crisp-tender Ligurian crust. Three moves make it reliable on any galley — and the longest step is the fridge doing nothing.

Pull a good focaccia from the tin and the top should crackle, then give way to a steam-laced, custardy crumb — not the dense slab or the greasy disc most versions settle for. The fix is never more oil. It is water, time, and what you flood into the dimples.

The one idea: focaccia is built by water turned to steam, not by oil — high hydration for an open, steam-laced crumb, and a salt brine flashed to steam in the dimples for the lift. Oil crisps and flavours the crust; it doesn’t make the holes.

Where it comes from

Focaccia is older than Italy itself: the name traces to the Latin panis focacius — bread baked in the focus, the ash and embers of the Roman hearth. It was the coast’s everyday bread, pressed flat to cook fast beside the fire and dressed with the only riches Liguria had to spare: olive oil and sea salt. From that one Latin root the word spread the length of the Mediterranean — Provence’s fougasse, Spain’s hogaza, the Genoese fugàssa, even the Balkan pogača — a whole family of breads named for the same hearth.

Genoa turned it into a ritual — the morning fugassa, warm and oil-slicked, torn into a cappuccino at the bar before work. That habit explains the shape. A focaccia is defined less by its crumb than by its surface: the dimples, the brine, the salt — because the surface is where the flavour was always poured.

The most celebrated focaccia of all uses no yeast at all. The cheese focaccia of Recco, just down the coast, is two sheets of dough rolled so thin they turn translucent around molten crescenza — the only Italian focaccia made with no leavening. The EU granted it protected IGP status in 2015, and by its rule it may be baked in just four Ligurian comuni: Recco, Avegno, Sori and Camogli. — EU PGI register, 2015

The hearth and the rituals are the romance. What actually separates a great focaccia from a sad one is the day you can’t see it doing anything — the one it spends cold in the fridge.

Park the dough at 4°C for two or three days and the yeast all but stops — its enzymes do not. Amylases keep carving starch into sugar, proteases loosen the gluten, and slow fermentation lays down organic acids. You taste it as a nutty, faintly sour depth no same-day dough can fake, and you feel it as a dough that stretches where a young one would tear.

Now make it
Active
25 min
Total
1–3 days incl. cold ferment
Yield
10–12 23×33 cm
Make-ahead
mix up to 3 days before
One-page galley cardThe whole recipe on a single A4 — print, pin, cook. Download PDF
The ratio — flour = 100%
Water 80% · Oil 5% · Salt 2.2% · Yeast 0.6% — high hydration is what gives the steam for a custardy, holey crumb; the low yeast lets the cold ferment carry the flavour.
Scale 12 portions · 23×33 cm

Ingredients

Dough
Salamoia (dimple brine)
Pan & finish

Method

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  1. Bakers call this first rest the autolyse — Raymond Calvel’s term for letting flour and water get acquainted before any work begins.

    Mix & autolyse. Whisk yeast into flour, add water + the 25 g oil to a shaggy mass — hold the salt. Rest 20 min.

    Why
    Gluten hydrates faster without salt competing for water; the rest aligns the strands before any work. Salt added after tightens the network. — McGee 2004; López-Alt
  2. At this wetness you don’t knead — the dough is too slack to hold a shape. You fold instead.

    Salt, then 4 coil folds over 2 h. Work in the 11 g salt. Wet hands, lift the centre till it stretches, tuck under, rotate; repeat at 30 / 60 / 90 min.

    Why
    At 80% hydration kneading fails; folds build the aligned gluten that traps big irregular bubbles — the open, custardy crumb. — Forkish 2012; Modernist Bread
  3. This is the step from the read — the one that looks like nothing and does everything.

    Cold ferment 24–72 h. Straight to the fridge, covered. 48 h is the sweet spot.

    Why
    At 4°C the yeast crawls while enzymes and slow fermentation build sugars, extensibility and organic acids — nutty, complex flavour no same-day dough matches. — Modernist Bread; McGee
  4. You’re proofing to a texture, not a clock.

    Pan & warm proof. 30 g oil up the pan. Scrape in, stretch to the corners (rest 15 min, stretch again). Proof 2–4 h at room temp until doubled and wobbling like set custard.

    Why
    The cold dough comes out tight and slow; a warm second proof lets the yeast regroup and the gluten relax so the trapped gas can expand into the open crumb. Judge it by feel, not the clock — a finger-dent that springs back slowly is ready, one that stays put is over-proofed and will collapse. — Forkish 2012; Modernist Bread
  5. Genoa calls this brine the salamoia; pour it on and you are no longer making oily bread but Ligurian focaccia.

    Salamoia, dimple, finish. Whisk 4 g salt into 30 g warm water, whisk in 40 g oil till cloudy; spoon over. Dimple to the pan with oiled fingers. Scatter rosemary + flaky salt.

    Why
    The brine carries salt into the dough, flashes to steam (lifting the craters), and the oil left behind crisps the crust. The whole Ligurian trick. — Nosrat 2017
  6. The crust sets in the oven and softens in the pan — so don’t leave it there.

    Bake 230°C (450°F), 20–25 min to deep golden / 96°C internal. Lift onto a rack within a minute — left in the pan the crust steams soft.

    Why
    High heat drives the last burst of oven spring, then Maillard browning builds the colour and flavour of the crust. The crumb only truly sets once the centre reaches ~96°C and its starch has gelatinised — pull it early and it bakes gummy. On a rack the escaping steam keeps the base crisp; trapped under the loaf in the pan, that same steam softens it. — McGee 2004; Modernist Bread
· scaling & progress save on this device

Tear it warm for the table with a dish of good oil for dipping, or split a slab horizontally for the best panino there is — mortadella, or mozzarella and tomato, pressed until the crust crackles. It carries soup, antipasti and any braise that needs mopping — and in Genoa they don’t overthink it, dunking a wedge straight into the morning cappuccino.

Take it further
Garlic-confit oilSwap the brine oil for the oil off a garlic confit — sweet, roasted depth and no raw bite
Cherry tomato & oreganoHalve and press cut-side up into the dimples; they roast down to jammy bursts
Potato & rosemaryWaxy potato sliced 2 mm and overlapped on top, oiled and salted — the Ligurian patate version
PissalandreaTaggiasca olives, thin red onion and a few anchovies pressed in — Liguria’s answer to pissaladière
Biga preferment150 g flour + 75 g water + a pinch of yeast, 12–16 h first, then drop the dough yeast to a third — deeper, nuttier flavour and a stronger crumb
SourdoughSwap the yeast for 100 g active levain; pull 50 g flour and 50 g water out of the dough to hold the ratio, and expect a longer proof
Schiacciata all’uvaTuscany’s harvest version — press wine grapes and a little sugar into the top for a sweet-savoury, late-summer loaf
Wholemeal swapReplace 20% of the flour with stoneground wholemeal and add 3–4% more water — earthier, with a slightly tighter crumb
One dough, two dishes — pan pizza

This dough is, near enough, Roman pizza in teglia — reason enough to make a double batch. Take half through the same cold ferment, then press it into the oiled tray and dimple only lightly.

SauceCrush good tinned San Marzano with salt and a slug of oil — raw, uncooked; spread thin and leave a border
Bake250°C (480°F), low in the oven, 12–15 min, until the rim blisters
CheeseTorn, well-drained mozzarella for the last 4–5 min only, so it melts without weeping or scorching
FinishBasil or oregano off the heat, and a last thread of oil

The same dough also rolls into grissini: cut the proofed slab into strips, stretch, and bake at 200°C until they snap.

Troubleshooting
Dense crumbUnder-proofed or baked cold → let it double and wobble before it goes in, and proof somewhere warm
Flat, no bubblesOver-proofed → catch it at double, not triple — it should jiggle, not sigh and collapse
Greasy, pale crustNo brine or oven too cool → use the salamoia and verify a true 230°C with a probe
Gummy centrePulled on colour, not doneness → bake to deep brown and 96°C internal, then cool 15 min before cutting
Sticks to the panToo little oil or a cold pan → 30 g oil minimum, and dark metal releases better than glass
Tears when stretchedGluten still tight or cold → rest 15 min and try again — a relaxed, room-temp dough stretches without fighting back
Tastes flatUnder-salted or rushed → the dough carries 2.2% salt and the brine adds more, but the flavour also needs the cold days
Sour, boozy smellOver-fermented — too warm or too long → colder fridge, shorter ferment; past 72 h the yeast outruns the flavour
Charter prep & storage

The cold ferment is the make-ahead — it works for you while you do other things. Mix on a provisioning day and the dough holds three days at 4°C, so you bake to order across a whole charter leg.

Make-aheadMix, fold, and park the dough up to 3 days at 4°C; bake straight from cold after a short warm proof
Par-bakeBake to pale (about 16 min), cool, then finish 5–6 min at 230°C at service — hot focaccia on demand without a fresh mix
Freeze the doughAfter the folds, freeze it in the tub; thaw overnight in the fridge and it ferments as it goes
Freeze it bakedCool fully, wrap well, up to 1 month; refresh 8–10 min at 180°C from frozen
Hold & refreshBest within 2–3 h of baking; re-crisp 4 min at 180°C — never the microwave, which steams the crust soft
Never the fridgeBaked bread stales fastest at fridge temperature; keep it wrapped at room temp, or freeze it
Scale upOne 23×33 cm tray feeds 10–12; double into a half gastronorm for a full crew-and-guests service

On a moving boat the slack, high-hydration dough is forgiving — it asks for an even stretch into the corners, not careful shaping, so swell is no enemy.

Once the ratio is yours — flour 100, water 80, salt 2.2 — the rest is improvisation: swap the brine oil for garlic confit, press halved cherry tomatoes into the dimples, or run a biga for deeper flavour. Feeding crew, bake it as one full tray and split the slabs for sandwiches — the same dough, two services. The hearth bread was always just flour and water under whatever the coast had to pour over it; pour something good.

Sources: McGee, On Food and Cooking; Myhrvold, Modernist Bread; Forkish, Flour Water Salt Yeast; Nosrat, Salt Fat Acid Heat; López-Alt, Serious Eats; EU PGI register (Focaccia di Recco col formaggio, 2015). Tested at sea.

What hydration and ferment do you run — and do you brine the dimples?

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