Like any ingredient, the amount of sourdough starter called for in a recipe varies. Some recipes only need about 3 tablespoons (40 grams) of starter; others might call for 1 cup (227 grams) or even 2 cups (454 grams) of starter. The post How to build the exact amount of ripe sourdough starter for a recipe : Need more starter for a recipe? Here’s what to do. appeared first on the King Arthur Blog.