Sourdough Instant Starter Culture pack of 3 This Instant Sourdough Starter Culture requires no cultivating. You can add this straight to your dough mix without any hassle of growing or maintaining your sourdough starter.  This culture contains: Yeast Dextrose Lactococcus lactis subsp. Cremoris Lactococcus lactis subsp. lactis Lactococcus lactis subsp. lactis biovar diacetylactis Storage: Store in freezer for optimum life (note that it can be stored at room temperature also and there is minimal impact on the lifespan for the time out of the freezer while the item is shipped.) Each sachet can be used to ferment dough recipes which use up to 6 cups of flavour. Contains: milk/dairy..