1 c. milk
3 tbsp. flour (heaping)
1/4 lb. butter
1/4 c. Crisco
1 c. granulated sugar
1 tsp. vanilla

Mix flour and milk and cook until very thick. Set aside until cold (the colder the better). Cream together butter, shortening, sugar, vanilla. Add cooled thickening and beat until well-blended and creamy. Use on cakes, donuts, or will fill 2 dozen cupcakes.