1 pkg. yellow cake mix
1 c. peanut butter
1/2 c. oil
2 eggs
2 c. chocolate chips
1 can Eagle Brand milk
2 tbsp. butter

Combine and stir by hand until dough holds together. Press 2/3 of dough into bottom of ungreased 13"x9" pan. Reserve remaining dough. Melt chips over low heat with the milk and butter. Stir until smooth. Spread over dough in pan. Drop reserved dough over filling. Bake at 350 degrees for 20 to 25 minutes. Cool and cut in bars.