Mom'S Glossy White Frosting (Cooked) - cooking recipe

Ingredients

3 egg whites
1/8 teaspoon cream of tartar
3 tablespoons Karo syrup
3/4 cup sugar
1/2 teaspoon vanilla (optional)

Preparation

Boil water in bottom of double-boiler pan (or largest saucepan).
Put all ingredients except vanilla into top of double-boiler (or round Pyrex bowl) over bowling water.
Stir with your finger until the heat is too much to take, then pour mixture into mixer bowl, add vanilla and beat smooth. Continue to beat until opaque and peaks form.
Cool before applying to cake.