You Make At Home 1 Packet Is All You Need You Can Do This Non-GMO We Make It Easy All You Need to Grow Healthy! Real Sourdough Bread Capture the unique, delicious texture and flavor of authentic San Francisco sourdough bread in your own kitchen. This heirloom-variety starter culture can be used to make bread, cookies, waffles, and whatever the family craves. Once activated, the starter culture can be maintained to reuse as a continuous source of leavening.