2 1/2 c. sugar
1 slightly beaten egg
1 stick butter
3/4 c. milk
1 tsp. vanilla

Melt 1/2 cup sugar in iron skillet slowly until brown and soft. Mix egg, butter, 2 cups sugar and milk into a small saucepan and cook over low flame until butter melts. Turn heat up to medium. Add browned sugar. Cook until it reaches a thickening stage or until mixture leaves side of pan, about 10 minutes. Remove from heat. Cool slightly, add vanilla. Beat until right to spread. Add cream if it gets too thick. Frost cake.