Ingredients

• 2 egg whites
• 1 pinch salt
• 1 1/4 cups light corn syrup (such as Karo®)
• 1 1/2 cups miniature marshmallows
• 1 teaspoon vanilla extract

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Instructions

1. In the bowl of a stand mixer, blend egg whites and salt together in a bowl on medium speed until soft peaks form.
2. Meanwhile, bring corn syrup to a boil in a saucepan; add marshmallows and stir until melted.
3. Raise mixer speed to high. Very carefully, pour the hot syrup in a steady stream between the side of the mixing bowl and the moving beater. Beat until mixture is cool enough to touch; mix in vanilla extract. Makes enough to frost a 9x13-inch cake or an 8-inch layer cake.