Its mostly in beans, cabbage, onions, cauliflower, broccoli, fluffy wheat products such as bread, apples, peaches, pears, prunes, corn, oats, potatoes, milk, ice cream, and soft cheese and foods that produce minimal gas include rice, bananas, citrus, grapes, hard cheese, meat, eggs, peanut butter, non-carbonated beverages, and yogurt made with live bacteria. Its also caused by laying down after eating because gas passes from stomach to intestine more readily in this position.