1 (9 inch) baked pie shell
1 1/2 c. powdered sugar
1/2 c. butter
1 (1 oz.) sq. unsweetened chocolate
1/2 c. peanut butter
1 heaping tbsp. flour
1 heaping tbsp. cornstarch
1/2 c. sugar
2 1/2 c. milk
3 egg yolks
3 tbsp. butter
1 tbsp. vanilla

Stir 1 cup powdered sugar into 1/2 cup butter and the melted chocolate. Beat until smooth. Spread over pie crust. Mix 1/2 cup powdered sugar with peanut butter and spread over chocolate layer. Mix flour, cornstarch, and sugar. Add a little milk and egg yolks; stir well. Add remaining milk and butter. Cook over medium heat, stirring until thick and bubbly. Remove from heat and stir in vanilla. Cool slightly and pour over peanut butter layer. Refrigerate and top with whipped cream.