1 baked pastry shell or graham cracker shell

FILLING:

1/2 c. soft butter plus 1 tbsp.
3/4 c. sugar
3 tbsp. cocoa
1 tsp. vanilla
2 eggs

Cream butter with sugar. Add cocoa and vanilla. Beat until smooth. Beat in 1 egg for 5 minutes. Beat in second egg for 5 minutes at high speed. Pour into bake shell and refrigerate.