Recipe Sourdough Starter: The 7-Day No-Fail Method

Typically 7 to 14 days of daily feeding. You may see some early bubbling in the first few days, but a reliable rise-and-fall cycle usually establishes around day 7. Cooler kitchens may need a few extra days.

Yes — all-purpose flour works fine for maintaining a starter. Whole wheat or rye flour can speed things up at the beginning because they carry more wild yeast and nutrients. Many bakers start with whole grain, then switch to all-purpose for daily feedings.

That sharp smell means your starter is hungry — it is producing excess alcohol and acids between feedings. It is not ruined: pour off any dark liquid (hooch) and feed it. If the smell keeps returning, feed twice a day or use a slightly larger feeding ratio.

It should reliably double in size within 4 to 8 hours of feeding at room temperature. Try the float test: drop a small spoonful in water — if it floats, it is full of gas and ready. It should also look bubbly and smell pleasantly tangy, not harsh.

Yes — a mature starter can rest unfed in the fridge for a week or two. For longer trips, give it a stiffer feeding (less water), refrigerate it, and plan a couple of room-temperature feedings to revive it when you return. Drying some starter as backup is smart insurance.

Discard is the portion of starter you remove before feeding, so you are not growing an unmanageable amount. It is absolutely usable — it adds tangy flavor to pancakes, crackers, and pizza dough. Only use discard from a starter that is at least a week old.