Frosted whole grain oat cereal with marshmallows. Made with whole grain. Wholesome and nutritious. Marshmallow Mateys are made with wholesome whole grain oats, plus 12 essential vitamins and minerals. They're naturally cholesterol free, low in fat and have 0 g trans fat. Costs less. Ounce for ounce, Malt-O-Meal cereals cost less than the leading box brands. We save by limiting packaging and advertising costs, and pass those savings on to you!