Buttermilk Chocolate Pie

3 Tbs. cocoa
1 Tbs. cornstarch
2 Tbs. flour
1 Cube melted butter
1 Cup buttermilk
1 tsp. vanilla

Mix together the cocoa, cornstarch and flour. Add to the melted butter and buttermilk. Cook, stirring constantly until thick. Add vanilla. Pour into a baked pie shell. Chill and serve with Cool Whip.

Recipe from Cookbook USA