Aunt Ruth'S Chocolate Pie - cooking recipe

Ingredients

3 egg yolks, save whites
1/2 c. flour
2 1/2 c. milk
1 tsp. vanilla
1 1/4 c. sugar
3 Tbsp. cocoa
1/2 stick butter

Preparation

Beat yolks and add dry ingredients.
Slowly add milk and mix until smooth.
Cook over low heat until thick.
Add vanilla and butter.
Pour into pie shell (baked).