Yeasty Sourdough Starter

This yeasty sourdough starter is the cheater’s version of the multi-week wild-yeast cultivation that gets the bread world all worked up. Mixing unbleached all-purpose flour with a packet of commercial active dry yeast and enough water to make a thick batter gets you a working starter overnight, not next month.

The trade-off is honest: the flavor will be milder and less sour than a true wild starter, but the bread it produces still gets that open crumb, chewy crust, and yeasty depth that store-bought sandwich loaves can never match.

Keep it somewhere warm (around 75 to 80 degrees Fahrenheit / 24 to 27 degrees Celsius) and you should see bubbles within a few hours and a strong yeasty smell by the 24-hour mark. That’s your cue that it’s ready to use or refrigerate.

Pro Tips

• Use a non-reactive container with room to grow. Glass or food-grade plastic is fine; avoid metal that might react with the developing acids.
• Cover loosely with a clean towel or plastic wrap with a few air holes. The starter needs to breathe but not dry out.
• Once active, feed weekly if refrigerated. Equal parts flour and water by weight, with a discard step to prevent overflow.

Variations

• Swap in whole wheat flour or rye for the first cup to encourage faster, funkier fermentation.
• Add a tablespoon of plain yogurt at the start for a tangier, more lactic flavor profile.
• Use bottled spring water instead of tap if your municipal water is heavily chlorinated; chlorine inhibits yeast activity.