3/4 c. sugar
1/3 c. flour
5 tbsp. cocoa
2 1/2 c. milk
2 eggs, beaten
dash of salt
1 tsp. vanilla
1 tsp. butter

In double boiler, combine sugar, flour and cocoa. Stir well. Add in milk, beaten eggs and salt. Stir thoroughly. Make sure no lumps in mixture. Constantly stir mixture until thickens, approximately 20 minutes. Take off heat. Add vanilla and butter, blended well. Pour into all ready baked pie crust. Let cool for about 1 hour.