Chocolate Pie Filling

Ingredients
- 1 c sugar
- 2 Tbsp cocoa
- 3 Tbsp flour
- 2 egg yolks
- 2 c sweet milk
- 1 Tbsp butter
- 1 tsp vanilla
Directions
- Mix sugar cocoa and flour together
- Mix milk and eggs together
- Combine these 2 mixtures
- Cook in double boiler until thick
- Add butter as mixture starts to thicken
- Cool mixture Add vanilla