Step 1

Combine the egg whites, sugar, water and cream of tartar in the top of a double boiler. Mix thoroughly.

Step 2

Simmer 2" of water in the bottom of a double boiler of medium heat. Place the top double boiler over the boiling water and beat constantly using an electric mixer on high speed until mixture holds a stiff peak. This will take at least 7 minutes, but most likely closer to 10 minutes.

Step 3

Remove from the heat.

Step 4

Add vanilla and beat until thick enough to spread.

Step 5

Makes 5-6 cups of frosting. Perfect for cakes or cupcakes.