Marshmallow Icing Recipe

A luscious topping for any cupcake, this decadent icing is particularly perfect on a S’mores Cupcake. Best of all you can whip up this frosting in seven minutes. Try this recipe for your next impressive dessert.


yields: enough frosting for 18 cupcakes

prep time: 9 minutes

cook time: 5 minutes

total time: 14 minutes


  • 1 cup of granulated white sugar (not powdered sugar)
  • 4 egg whites, room temperature
  • 1/3 cup of water
  • ½ teaspoon cream of tartar
  • 1 teaspoon vanilla


Step 1: In a medium saucepan, bring the 1/3 cup of water, sugar, cream of tartar to a boil. Do not stir the sugar mixture as this will cause it to crystallize. Boil until you have thick clear bubbles (about 5 minutes). Once the bubbles appear, do not boil even a second longer.

Marshmallow Frosting - Step 1

Step 2: In a metal bowl that fits into your electric mixer, add the egg whites and beat them until they start to get thick and form soft peaks.

Marshmallow Frosting - Step 2

Step 3: Set your timer for 7 minutes. Beat the egg mixture on high speed while slowly streaming the sugar syrup in a little at a time into the mixer for 7 minutes.

Marshmallow Frosting - Step 3