This is something that you don't want to cook on very high heat. If you cook it too fast, it'll be very lumpy or almost a curdled texture. This is supposed to be a smooth, creamy, luscious drink. Cook slowly. This can be served at a party or gathering from a punch bowl. Store in refrigerator till ready till use & refrigerate any leftovers in a covered container. We use a rinsed out milk jug.