Looking for instructions on how to make Sourdough Bread using the Mad Millie Sourdough Culture? Each sachet contains Mad Millie Sourdough culture in powder form. The Starter Culture requires no cultivating, you add it straight to your dough mix without having to grow or maintain a sourdough starter. Each sachet can be used to ferment dough recipes that use up to 6 cups of flour. Contains milk/dairy.