2/3 c. butter, soft
2 c. sugar
4 eggs, beaten
6 heaping tsp. cocoa (Hershey's)
1 1/2 c. flour
1/4 tsp. salt
1 tsp. baking powder
2 tsp. vanilla
Chopped walnuts (opt.)

Grease 13"x9" pan. Bake 30 minutes. Cut recipe in half for 8" square pan.