1 cup graham cracker crumbs
1/2 cup butter, melted
2 cups powdered sugar
2/3 cup peanut butter
1 teaspoon vanilla
1 cup (6 ounces) chocolate chips, melted
Combine everything but the chocolate chips, and press in a greased 8×8″ pan. Spread melted chocolate chips over top with a spatula, covering entire surface. Chill 2 hours.