Line a 13 by 9 by 2-inch pan with foil.
Combine the butter, peanut butter, sugar, and graham cracker crumbs in a food processor. Process until the mixture forms a ball. Press into the foil-lined pan using your hands or a spatula.
Melt the chocolate chips in a double boiler over simmering water or in a microwave-safe glass dish in the microwave for 1 minute on high (100%). Stir. If the chocolate has not completely melted, microwave for 10 seconds more, then stir. Spread evenly over the cookie layer with a spatula. Chill for several hours.
When ready to serve, allow the candy to come to room temperature before cutting into pieces. Store in an airtight container in the refrigerator.
Recipe courtesy of Paula Deen