Chocolate Frosting

4 squares unsweetened chocolate
1 1/4 cup milk
4 Tbsp. flour
1 cup sugar
2 Tbsp. butter
1 tsp. vanilla

Add chocolate to milk in top of double boiler and heat. When chocolate is melted, beat until blended. Sift flour with sugar. Add a small amount of chocolate mixture stirring until smooth. Return to double boiler. Add butter and vanilla. Cool until thickened and spread on cakes. Will cover tops and sides of two nine inch layers.