1 c. butter, melted
1 c. peanut butter
2 c. graham cracker crumbs, finely ground
2 1/2 c. powdered sugar, combine crumbs and sugar before adding to the liquid
butter and peanut butter

Use a large saucepan to melt butter; add peanut butter and blend in the dry ingredients. Blend well and press into a 9 x 13 inch pan. Melt 1 cup chocolate chips and 1 teaspoon vegetable oil in a small pan. Spread on top of the peanut butter mixture. Chill and cut.