Use with the Mad Millie 15 Minute Sourdough Kit Add straight to your dough mix Each sachet cultures up to 6 cups of flavour Keep a few extra sachets of Instant Sourdough Starter in your pantry and always be ready to mix and bake a healthy sourdough loaf. This special blend of ingredients requires no cultivation so you will never have to bother with growing or maintaining your sourdough starter, simply add straight to your dough mix and in only 15 minutes your bread can be baked to crusty perfection.