Fluffy White Frosting aka Seven Minute Frosting

1 Cup granulated sugar
1/3 Cup water
1/4 teaspoon Cream of Tartar
Dash of salt
2 unbeaten egg whites at room temperature
1/2 teaspoon vanilla

Combine sugar, water, cream of tartar and salt in saucepan. Bring to boiling, stirring till the sugar dissolves. Very, very slowly add to unbeaten egg whites in mixing bowl, beating constantly with mixer until stiff peaks form in the bowl when you lift the beaters. Then beat in vanilla.
Frosts tops and sides of 2 each 8" or 9" layers or 9xl3 cake.

Tips: The reason you want the egg whites at room temperature is that they will beat up fluffier than when cold. Also you want to add the hot mixture to the eggs slowly or it cooks the eggs. Also eat up soon or the frosting dissolves/evaporates into the cake.