If you live on a farm, do not use raw milk to make the Dream Whip. It's not so bad if you eat it right away; but if you notice on the box it says to use pasteurized milk. If raw milk is used, it begins to taste strange after about a day. Then it gets worse as the days go by. It's not sour or spoiled, but it sure is a strange taste. We finally figured it out when people brought it to church dinners. If it was made the day before with raw milk, it had that funny taste.