1 stick butter, melted
1 1/4 c. graham cracker crumbs
3/4 c. peanut butter
1 1/2 c. powdered sugar
2 c. (12 oz.) chocolate chips

Combine first 4 ingredients. Mix well. Melt chocolate (in double boiler or microwave). Pour 1 cup chocolate on bottom of pan. Spread peanut butter mixture evenly over chocolate. Put rest of chocolate on top. Refrigerate until firm.