You Make At Home 2 Packets of Starter Culture You Can Do This Non-GMO Gluten Free We Make It Easy All You Need to Grow Healthy! Real Buttermilk There should always be some buttermilk in your fridge. Nutrient-rich and versatile, this starter culture will make fresh, heirloom-style buttermilk in less than a day. Use it to bake, drink it, or add it to cream to make your own butter at home. Once activated, the starter culture can be re-used over and over.