Gluten-free pizza dough: why it holds, and the complete model to get it right

The short answer

In a wheat dough, gluten forms an elastic network that holds the gas of fermentation and stretches without breaking. Without gluten, that job is done by a hydrocolloid gel, most often psyllium husk powder (2 to 4 % of the flour weight), sometimes helped by xanthan gum (0 to 2 %). That gel holds gas and gives extensibility, but it is weaker than a gluten network: it demands a lot of water (87 to 120 % of the flour weight, against 55 to 70 % for wheat), it does not strengthen with time, and an over-proofed dough does not tear, it collapses. The final texture is set by two dials: the share of pure starches in the blend (35 % for a soft crust, 62 % for a crisp one) and the hydration. Everything else follows from there.

The five layers of a gluten-free dough

The eleven yeasted doughs in Kelli and Peter Bronski's No Gluten, No Problem Pizza, which are the basis of Fornello's formulations, are all built on the same architecture. Once you see it, you can read any gluten-free recipe and predict how it will behave.

1. The body: whole flours

White or brown rice, quinoa, millet, teff, buckwheat. They bring the protein and fibre, hence flavour, colour (the Maillard reaction needs protein) and part of the water absorption. Quinoa, at 14 % protein, is the "strong flour" of the gluten-free pantry. The flour share runs from 38 % in a cracker crust to 63 % in a pan dough.

2. The starches: tapioca, potato, corn

They give tenderness, crispness and above all the set: starch gelatinises between 60 and 75 °C depending on its source, and that is the moment the dough stops being a batter and becomes a crumb. Each starch has its signature. Tapioca starch gels elastic and glossy: chew and blisters. Potato starch gels soft: a moist crumb. Cornstarch gels short: crisp, brittle. The book pairs tapioca with potato starch for soft styles (New York, pan) and cornstarch with potato starch for crisp ones (Roman, Chicago).

3. The gluten substitute: psyllium, then xanthan

Psyllium husk powder is in every formulation, at 2 to 4 % of the flours. Its mucilage builds a viscoelastic gel that holds gas and gives extensibility: the dough spreads without tearing. Xanthan gum, from 0 to 2 %, adds elasticity, snap-back, and a faster set under violent heat. It is there wherever the dough must be rolled thin or set fast (Roman, Chicago, Neapolitan, grilled), and absent from every pan dough, where the pan holds the sides. The psyllium dose follows the same logic: 3.5 to 3.8 % when the dough has to stand on its own, 2 % when a rolling pin or a pan helps it.

4. Water: 87 to 120 %

Starches and psyllium are thirsty, and there is no network to tighten. The dough is therefore a thick dough that is poured or pressed out with oiled hands, never kneaded. Hydration follows the style: 93 % for the Roman cracker, 95 % for pan doughs, 104 % for the New York, 111 % for the Neapolitan, 120 % for the grilled dough, whose coconut flour drinks nearly three times its weight.

5. Fat, sugar, salt, yeast

Oil, 7 to 10 %, gives the tenderness and colour gluten no longer gives; the home-oven Neapolitan climbs to 30 % to brown in four minutes at 285 °C, and the Chicago crust takes 16 % butter to be short. Sugar, 3 to 5 %, feeds the yeast and colours the crust, because a gluten-free flour lacks the wheat amylases that free sugars. Salt is higher in the quick, crisp doughs, where there is little fermentation aroma. Yeast is halved for a 48-hour cold version.

Gluten-free fermentation: what changes

Yeast does not care about gluten: it eats sugars and makes gas at the same speed, along the same temperature curve. What changes is what holds that gas. A psyllium gel does not develop with time the way gluten does, and it does not tear when pushed too far: it slumps. Three practical consequences.

• Quick doughs are baked at once or after 20 to 40 minutes. Par-baking a thin dough right after shaping gives the biggest blisters: fresh yeast gas pushes under a surface still taut.
• Pan doughs rise 90 to 120 minutes in the pan, somewhere warm: the pan carries the sides, the gel only has to hold upward.
• The 48-hour cold version keeps the same formula with half the yeast. It gains flavour, digestibility and suppleness, because the starch hydrolyses slowly; it blisters less, because the relaxed gel lets the big pockets escape. It is a trade, not a free upgrade.

The gluten-free Neapolitan is mixed after the oven has preheated and shaped at once: at 111 % water and 30 % oil the gel slackens within the hour.

Seven families, eleven formulations, in the calculator

Fornello builds the book's formulations in as parametric families: each family carries the window inside which its logic still holds (starch share, psyllium, xanthan, water, fat, salt, sugar, yeast by schedule). You load a formulation, change whatever you want, and the calculator tells you which rule you just left and why it matters. Change a flour or a binder and the water follows on its own: replacing tapioca starch with coconut flour asks for 45 more points of water, and the tool adds them.

Percentages of total flour weight (baker's percentage), computed from the published grams. Source: Bronski and Bronski, 2019.

The calculator below opens in gluten-free mode on the quick New York. Change the formulation in the selector, then remove the xanthan from the Roman, drop the New York's psyllium to 1 %, or put in the water of a wheat dough: each time the tool names the rule and its window.

Outside the model: farinata and vegetable crusts

The same book offers three grain-free bases that are not yeasted doughs and that Fornello deliberately does not model. Ligurian farinata is a batter of chickpea flour and water (about 260 % water), rested 3 to 8 hours, baked in a very hot cast-iron pan with plenty of oil: no yeast, no gel, a dense and flavourful flatbread. Cauliflower and zucchini crusts hold through egg and cheese, after the vegetable has been squeezed dry. They are good answers for a menu, not pizza doughs in the calculator's sense: the gel and fermentation rules say nothing true about them.

For a pizzeria: the market exists, in Quebec as in Italy

Celiac disease affects about one person in a hundred in the populations studied. In Canada, a University of Toronto study published in BMJ Open (2017) found the characteristic antibodies in about 1 Canadian in 114, and nearly 90 % of those people did not know. In Italy, the Ministry of Health's Relazione annuale al Parlamento sulla celiachia 2024 counts 279,512 diagnosed people and over 14,000 new diagnoses in the year; the Associazione Italiana Celiachia estimates the real population at around 600,000, and its Alimentazione Fuori Casa programme gathers more than 4,000 establishments, many of them pizzerias. A well-made gluten-free line is not a concession: it is one more table, every evening, with the friends and family who come along.

For a kitchen in service, the formulation is only a start. Fornello's Pro space lets you lock a house specification (flours, binders, water, schedule), decline it by pan format, and get the cost per dough ball and a printable production sheet out of it. That is what turns a recipe that works one night into a product that works every night.