Most pizza dough is made in a few hours. Mix flour, water, yeast, salt. Wait a bit. Bake. It works in the sense that it produces something flat with toppings on it. But it does not produce great pizza. Great pizza starts at least three days before it ever sees an oven, and the reason is biology.
What actually happens during fermentation
Fermentation is the process by which microorganisms, specifically wild yeasts and lactic acid bacteria, consume the sugars present in flour and produce carbon dioxide, alcohol, and organic acids as byproducts. The carbon dioxide is what makes dough rise. The alcohol burns off in the oven. The organic acids, primarily lactic and acetic acid, are what make the difference between bread that tastes of something and bread that tastes of nothing.
When you rush that process with commercial yeast at room temperature, you get fast gas production and fast rise. The dough inflates. The gluten network is under stress. The flavour compounds have barely started to develop. You get crust that is airy but bland, soft where it should be crisp, and dense where it should be open.
Slow cold fermentation changes all of that. At refrigerator temperatures, somewhere between 2°C and 5°C, yeast activity slows to a crawl. Bacterial activity slows too, but not as dramatically. The bacteria keep working. Over 72 hours they produce a sustained, complex accumulation of acids that give sourdough its depth and its characteristic tang. The long ferment also gives enzymes in the flour, particularly proteases and amylases, time to break down long protein chains into shorter, more extensible ones. The result is a dough that is easier to stretch, more relaxed, and structurally far stronger when it meets heat.
Why it matters for Roman-style pizza specifically
Roman pizza al taglio is a high-hydration dough. Ours runs at around 80 percent hydration, meaning for every kilogram of flour there is 800 grams of water. That is a wet, slack, difficult dough to work with. It is also the reason Roman pizza has that particular open crumb structure, the large irregular air pockets, the light interior, the crust that shatters when you bite it rather than compressing like foam.
To pull that structure off consistently, the gluten network has to be exceptionally well developed and the dough has to be completely relaxed before it goes into the pan. Short fermentation does not give you that. The gluten is tight, the dough fights back, and when you try to stretch it into the baking tray it shrinks and the base ends up thick and uneven. Three days of cold fermentation makes the dough cooperative. It spreads cleanly, holds its shape, and when it hits a 300°C deck oven it does exactly what you want it to do: spring up fast, develop a crisp base, and hold an open, almost focaccia-like interior without collapsing under the weight of the toppings.
The sourdough starter is not decoration
We do not use commercial yeast. Our leavening comes entirely from a live sourdough starter, a culture of wild yeasts and bacteria that we maintain and refresh daily. The microbial diversity in a mature starter is meaningfully different from a packet of dried yeast. Wild yeasts ferment more slowly and produce a wider range of flavour compounds. The lactic acid bacteria that coexist with them produce acids that actively inhibit mold growth, which is why properly fermented sourdough stays fresh longer than conventionally leavened bread. It also means better digestibility: the long ferment pre-digests a significant portion of the gluten and phytic acid, the antinutrient that blocks mineral absorption.
That starter does not just go into the pizza dough. The same culture leavens our sandwich bread, our croissants, our bomboloni, and our cinnamon rolls. Everything that comes out of this bakehouse is built on 72 hours of the same process. The flavour profile is consistent because the foundation is consistent.
What you taste because of it
You taste it in the crust first. There is a clean, mild acidity that lifts everything, the way a squeeze of lemon lifts a dish without making it taste of lemon. The base is crisp without being hard. The interior is tender without being gummy. The flavour of the wheat comes through because the fermentation has unlocked it, not buried it under yeast by-products from a rushed process.
You taste it in how long the pizza holds. Roman pizza al taglio is designed to be served at room temperature as well as hot. Properly fermented sourdough crust does not go limp and sad twenty minutes after it comes out of the oven. It stays crisp. The acids in the crumb slow the staling process at a structural level.
None of this is new knowledge. Roman bakers have been cold-fermenting high-hydration doughs for generations. We did not invent the method. We came to Dubai and did it properly, because cutting corners here would mean making pizza that does not deserve to carry the name. Three days is how long it takes. That is the deal.