Learning how to make Greek yogurt at home is simple with this easy recipe. Start by making homemade yogurt by heating milk, combining it 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 step beyond 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.