Chocolate Pie - cooking recipe

Ingredients

1/3 c. cocoa
1/2 c. plain flour
1 1/2 c. sugar
1 1/2 c. milk
4 egg yolks
1/4 tsp. salt
1 tsp. vanilla
1 Tbsp. butter

Preparation

Mix dry ingredients. Combine with remaining ingredients. Cook over medium heat, stirring constantly, until thick. Pour in baked pie shell.