A soft, spongy candy made of sugar, corn syrup, gelatin and egg whites. Commercial marshmallows come large and small, white and colored. Marshmallow creme is a thick, creamy commercial product that looks like melted marshmallows. It's often used as an ice-cream topping or in making shortcut fudge. People seldom realize that marshmallows can be made at home. The preparation method-hot syrup is added very slowly to a beaten egg white- is similar to divinity.