Marshmallow Frosting Recipe

Ingredients

• 4 large egg whites ((140g))
• 1 cup granulated sugar ((200g))
• ½ teaspoon cream of tartar
• ½ teaspoon vanilla extract
• ⅛ teaspoon salt

Steps

1. 1

   In a medium, heat-proof mixing bowl (that fits over a double-boiler), whisk together the egg whites, sugar, and cream of tartar for 1 minute until foamy. Scrape down the sides of the bowl with a spatula.

2. 2

   Fill the double-boiler with 1 inch of water and bring it to a simmer over medium-high heat. Reduce the heat to medium-low and place the bowl with the egg mixture over top, ensuring that the bottom of the bowl does not touch the water.

3. 3

   Cook the egg white mixture, stirring frequently, for 8 to 10 minutes until the sugar is dissolved and the temperature reaches 160°F. (Be careful, the mixture is very hot. You should not feel any sugar granules when rubbed between your fingers.)

4. 4

   Place the egg mixture in the bowl of a stand mixer fitted with the whisk attachment. Add the vanilla and salt. Beat on high speed (level 8) until thick and glossy and the sides of the bowl are just warm to the touch, 4 to 5 minutes.

5. 5

   Spread or pipe the frosting onto a cake or cupcakes. (This frosting should be used immediately as the meringue will start to set after it is whipped.) You can use a kitchen torch to toast this meringue-style icing, if desired.