Chocolate Cream Pie

Directions

1. 1
   In saucepan, combine and sift sugar, flour, cocoa and salt. Mix well.
2. 2
   Gradually stir in milk. Cook in double boiler over boiling water, stirring constantly until mixture begins to thicken. Put on top and cook for 15 minutes.
3. 3
   Remove top and stir small amount of hot mixture into yolks.
4. 4
   Return to hot mixture.
5. 5
   Cook 2 minutes more, stirring constantly. Remove from heat.
6. 6
   Add butter and vanilla.
7. 7
   Cool to room temperature.
8. 8
   Pour into baked pastry shell.