- 3 cups warm water (110 degrees F)
- 1 1/2 tablespoons active dry yeast
- 1 teaspoon sugar
- 3 cups all-purpose flour
- In a large bowl, combine the water, yeast, and sugar. Let sit until the yeast becomes foamy, about 5 minutes. (If the yeast does not foam, discard the mixture and begin again with a new yeast.)
- Add the flour and stir vigorously to work air into the mixture. Cover with a towel let rest in a warm, draft-free place (an oven with its pilot light or light bulb turned on works well) for 8 to12 hours. (The mixture should become very bubbly.) Use immediately or cover loosely with plastic wrap and store in the refrigerator.
- Preserving the Starter: Each time you remove a portion of the starter for a recipe, reserve at least 1/4 cup and replace the amount you have taken out with equal amounts of flour and water.
- For example, if you remove 1 cup of starter, you must replace it with 1 cup of flour and 1 cup of warm water. Whisk these ingredients into the starter until blended but not completely smooth, cover loosely, and return to the refrigerator.
- Also, the starter must be maintained by feeding it every few days. Refresh by removing 1 cup of the starter (give to a friend or discard it) and adding 1 cup of flour and 1 cup of warm water. Whisk until blended but not smooth. Cover loosely and return to the refrigerator.
- If you plan to be away longer than a week, freeze the starter in a sterilized, airtight freezer container. Thaw the starter 2 days before you plan to bake with it. Refresh as indicated above with 1 cup each of flour and warm water. Cover and leave at room temperature 12 hours or overnight before using.
- CAUTION: Never keep your starter tightly closed! The gasses expelled by the yeast will build up pressure and may cause the container (such as a glass jar) to burst!