72-hour cold fermentation – deepest flavour, highest flour demands
72 hours in the fridge gives the roundest, tangiest crust of the three cold ferments – but only flour with real strength holds together that long.
Quick answer: 72 hours in the fridge at 4 °C gives the deepest, slightly tangier flavour of the house method’s three cold fermentations – but it also makes the highest demands on the flour’s strength. A weak flour can’t hold its shape that long; make sure you know what you’re baking with before you commit three days to it.
The timeline for 72 hours
| Time | Step |
|---|---|
| 0:00 | Mix and knead following the house recipe. |
| 0:00–0:45 | Short bulk fermentation at room temperature, see bulk fermentation. |
| 0:45 | Ball into 250 g balls, airtight in the fridge at 4–8 °C. |
| 0:45–69:00 | Cold fermentation in the fridge. |
| 69:00–72:00 | Take the balls out, bring to room temperature covered for 2–3 hours. |
| 72:00 | Stretch by hand and bake. |
What happens to the gluten after 72 hours
According to the house method’s own table in the cold fermentation guide, 72 hours needs ”stronger flour (a higher W value), otherwise the dough risks turning too slack” – that’s the point where the house method itself flags flour strength as the deciding factor, rather than an exact, measured time limit. Enzymes keep breaking down both starch and part of the gluten network throughout the fermentation (see gluten); a flour that’s strong enough still holds together, while a weak one becomes increasingly floppy and hard to stretch without tearing.
Which flour types can handle it
A stronger imported tipo 00 flour such as Caputo Cuoco (W 300–320, see the Caputo guide) is built precisely for long, cold fermentations and is the safe bet for 72 hours. Ordinary supermarket flour has no published W value and is already a risk at 48 hours – at 72 hours the odds of the dough becoming hard to handle are higher. We have a test set up to measure exactly where the limit lies: 24, 48 or 72 hours in the fridge.
Adjust the yeast quantity even further down
The longer and colder the fermentation, the less yeast is needed (see the yeast guide). A 72-hour dough takes less yeast than the house method’s 48-hour standard. Don’t guess the amount – the calculator works it out exactly based on your yeast type and schedule.
The flavour after three days
Expect a noticeably rounder, slightly tangier flavour than at 48 hours, with a rim that’s easier to digest because the enzymes have had time to break down more of the starch and some of the gluten. Salt (see salt) plays a bigger role the longer the fermentation runs – it’s salt’s braking effect on the yeast that makes a 72-hour dough plannable at all, instead of becoming overproofed after just one day.
Frequently asked questions
Does the flavour just keep getting better the longer the dough ferments? No. Past a certain point the flavour turns more tangy rather than better, and the risk of overproofed dough or a dough that loses structure (see gluten) increases. In the house method’s own assessment, 72 hours is a reasonable upper limit, not a guarantee of an even better result the longer you wait beyond it.
Do I have to use expensive Italian flour for 72 hours? Not strictly necessary, but it reduces the risk considerably. If you’re unsure of your flour’s strength, try 48 hours the first time instead.
Read the full background in cold fermentation, go back to 48 hours if 72 feels too uncertain, and work out the quantities in the calculator.
