Meringue Buttercream - cooking recipe

Ingredients

1 1/2 cups egg whites, at room temperature
3 cups sugar
3 lbs unsalted butter, at room temperature
1 tablespoon vanilla extract or 1 tablespoon other flavoring

Preparation

In a large bowl, combine the egg whites and the sugar and whisk until well blended; (yes, your arm will get tired).
Set the bowl on top of a double boiler, or transfer mixture to the top pan of a double boiler and whisk constantly until the mixture is hot to the touch.
Transfer to your mixer's bowl and beat on High with the whisk attachment until the bowl has cooled to the touch and the meringue forms stiff peaks.
While beating on medium speed,slowly add the room temperature butter about 1/4 cup at a time.
When all the butter has been added, it should be thick and creamy.
Add the vanilla and blend until combined.
This can be stored at room temperature for up to a day, refrigerated up to a week, and frozen up to a month.