Some people toss the liquid from the yogurt after they have strained it. But if your motto is u0022waste not want notu0022 you can use to cook with. I have used it to replace some of the water or milk in homemade bread, pancakes, waffles and oatmeal. I am sure there are other uses too (leave a comment below!). If you have farm animals some folks like to feed it to their pigs or chickens.