Chocolate Icing - cooking recipe

Ingredients

2 sq. chocolate, cut fine
1 egg
1 c. sugar
3 Tbsp. milk
2 Tbsp. butter
1 tsp. vanilla

Preparation

Beat egg.
Add sugar, butter, milk and chocolate.
Cook slowly, stirring constantly.
When mixture comes to a boil, remove from heat.
Add vanilla; beat until thick enough to spread.