Chocolate Pie - cooking recipe

Ingredients

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

Preparation

Mix all ingredients except butter.
Cook until thick; take off stove.
Add butter and stir until smooth.
Pour in pie shell. Beat egg whites.
Add 6 tablespoons, two at a time.
Put on pie and brown.