Hot Cheddar Cheese Dip
["8 oz. shredded white Cheddar cheese", "1/2 c. Parmesan cheese", "1 1/2 c. mayonnaise", "8 oz. shredded yellow Cheddar cheese", "1 small onion, diced"]
["Mix all ingredients, pour into baking dish, sprinkle extra shredded Cheddar on top. Bake at 350\u00b0 for 20 minutes."]
["shredded white Cheddar cheese", "Parmesan cheese", "mayonnaise", "shredded yellow Cheddar cheese", "onion"]