Sourdough starter is a fermented dough made from flour and water. It is used as a leavening agent in baking, and it can add a distinctive sour flavor to bread. To add sourdough starter to any recipe, simply substitute it for a portion of the flour and water in the recipe. For example, if a recipe calls for 3 cups of flour and 1 cup of water, you could replace 1 cup of flour and 1/2 cup of water with 1 cup of sourdough starter.
Sourdough starter is a good source of probiotics, which are beneficial bacteria that can help to improve gut health. It is also a good source of fiber and vitamins. Sourdough bread has a lower glycemic index than white bread, which means that it can help to regulate blood sugar levels.