Now if you want vanilla yogurt, you want to add your ingredients to this step. I made vanilla yogurt since I started with a vanilla starter and the kids really like vanilla. Once my starter was mixed in I add 3/4 cup sugar and 1 TBSP vanilla extract to the milk. You can adjust it to your taste here. Next time I make it I'll stick to the 3/4 cup sugar, but I think I'll increase the vanilla to 1.5-2 TBSP.