Step 1

Set a heatproof bowl over a saucepan of simmering water.

Step 2

Add the sugar, corn syrup, egg whites, and a 1/4 cup of water to the bowl.

Step 3

Cook over medium heat, stirring frequently, until the mixture reaches 160 degrees.

Step 4

Remove the bowl from the stove and fit it into stand mixer. Set up the whisk attachment.

Step 5

Beat the mixture on high speed until glossy and fluffy, about 5 minutes.

Step 6

Beat in the vanilla extract, and use immediately.