Fun and easy to make, even on a boat! When we leave port for several days this comes in handy! This can be made in a crock pot or a sauce pan. Besure to watch the milk carefully that it doesn't scortch. All you need are a crock-pot or pan, wide-mouth thermos bottle, an instant read thermometer, milk, powdered milk, and some lactobacillus powder (available at health food stores) or some plain yogurt from previous batch or purchased plain yogurt with live culture.