Set a heat-proof mixing bowl on top of a saucepan containing two inches of water. (I just used my metal stand mixer bowl)

To the bowl, add the egg whites, sugar and salt.

Heat the water to boil over medium while whisking the egg mixture.

Allow the egg mixture to be slowly heated until it becomes very frothy.

You will know when it’s done when the sugar is dissolved. You can check this with your finger to see if there are no more grains of sugar left. Be careful, the mixture may be hot!

Once ready, remove from heat and add the vanilla.

Using a hand mixer or stand mixer at high speed, whip until thick peaks form. This will take 5-10 minutes. You will know it’s ready when the frosting is thick and when you touch your finger to it, a small straight peak remains.

Your frosting is ready to piped or spread.