1/2 stick butter
1 1/2 c. sugar
3 tbsp. cocoa
1 tsp. vanilla
2 eggs
1/2 c. evaporated milk

Melt butter. Add sugar, cocoa, vanilla, eggs and milk.

Bake in unbaked pie shell at 400°F for 10 minutes, then at 350°F for 20 to 25 minutes.