This cake frosting is named for the length of time it must be beaten in the final stage.
- Yield: Makes about 1 quart
Photography: Johnny Miller
Source: Martha Stewart Living, December/January 1999
- 3/4 cup plus 2 tablespoons sugar
- 1 tablespoon light corn syrup
- 3 large egg whites, room temperature
In a small, heavy-bottom saucepan, combine 3/4 cup sugar, corn syrup, and 4 tablespoons water. Place over medium heat, stirring occasionally, until sugar has dissolved, about 4 minutes. Rub a bit of the mixture between your fingers, making sure any graininess has disappeared. Raise heat, and bring to a boil without stirring. Continue boiling, occasionally washing down the sides of the pan with a pastry brush dipped in cold water to prevent sugar from crystallizing, until a candy thermometer registers 230 degrees, about 5 minutes. (Depending on the humidity, this can take anywhere from 4 to 10 minutes.) Remove the syrup from heat (temperature will keep rising).
Meanwhile, in the bowl of an electric mixer, whisk the egg whites on medium speed until soft peaks form, about 2 1/2 minutes. Gradually add remaining 2 tablespoons sugar. With mixer on medium-low speed, pour syrup in a steady stream down side of bowl (to avoid splattering).
Beat the frosting on high speed until cool, about seven minutes. It should be thick and shiny. Use immediately.