1 1/2 c. sugar
1 c. sm. marshmallows
2 egg whites (room temperature)
3 tbsp. white syrup
5 tbsp. cold water
1 tsp. vanilla (after frosting is cooked)

Use double boiler and beat mixer on high. Add vanilla after taking off stove.

Add sugar to egg whits, also syrup and cold water. Have water boiling when you put containers on to beat. Add marshmallows as soon as mixture is mixed good. Beat on high for 7 minutes. Take off stove and add vanilla.

This si usually more than you need for a sheet cake. You can store the leftover in the refrigerator for 2 weeks if you need it for another cake.