Under 30 Minutes

Swiss Meringue Buttercream

Use this recipe for our Number-Themed Mini Birthday Cupcakes, "Who's Counting?" Birthday Cake, or Pastel Layer Cake.

  • Prep:
  • Total Time:
  • Yield: About 10 cups (enough for 7 dozen Number-Themed Mini Birthday Cupcakes, 1 "Who's Counting?" Birthday Cake, or 1 Pastel Layer Cake)

Source: Martha Stewart Living, January

Ingredients

  • 2 1/4 cups sugar
  • 10 large egg whites, room temperature
  • Pinch of salt
  • 8 sticks unsalted butter, room temperature, cut into small pieces
  • 1 tablespoon pure vanilla extract
  • Gel-paste food coloring (optional; nycake.com)

Directions

  1. Heat sugar, egg whites, and salt in a heatproof mixer bowl set over a pan of simmering water, whisking, until sugar dissolves, about 2 minutes.

  2. Return bowl to mixer, and whisk, gradually increasing speed from low to medium-high, until stiff, glossy peaks form, about 10 minutes. Reduce speed to medium. Add butter, a few pieces at a time, whisking well after each addition. Whisk in vanilla. Switch to a paddle attachment. Beat until air bubbles are gone, 2 to 3 minutes more.

  3. Beat in food coloring, 1 drop at a time, until desired color is achieved. (If making more than 1 color, divide buttercream and work in batches.)

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