Learning how to make greek yogurt at home is simple with this easy homemade greek yogurt recipe. Start by making homemade yogurt by heating milk, combining with a little bit of already-cultured yogurt and letting it sit in a warm spot until the milk turns into yogurt. Making protein-rich greek yogurt takes one more step than making regular yogurt: straining the yogurt to thicken it. You can add the leftover liquid--also known as whey--to smoothies, or you can use it in place of buttermilk in baking.