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Boiled Frosting

Prep time 9 mins
Cook time 10 mins
Yield 7 1/4 cups

Ingredients

  • 1 1/2 cups sugar
  • 1/2 cup water
  • 4 egg whites
  • 1/2 teaspoon cream of tartar
  • 1/8 teaspoon salt
  • 6 large marshmallows, cut into small pieces

How to Make It

  1. Combine sugar and water in a heavy saucepan. Cook over medium heat, stirring constantly, until mixture is clear. Cook, without stirring, until syrup reaches soft ball stage or candy thermometer registers 240° (about 10 minutes).

  2. While syrup cooks, beat egg whites at low speed with an electric mixer until foamy. Add cream of tartar and salt; beat at medium speed until soft peaks form. Increase to high speed, and add hot syrup in a heavy stream. Add marshmallows, a few pieces at a time. Beat until stiff peaks form and frosting is thick enough to spread.