Line a 9x13 pan with a layer of club crackers. Meanwhile, bring butter, sugars, milk and graham cracker crumbs to a boil.

Boil approximately 5 minutes, let cool slightly.

Pour half of mixture on crackers and spread, put on another layer of crackers and then pour remaining mixture over crackers.

Put on another layer of crackers. Melt the chocolate chips. Stir in the peanut butter and spread over the last layer of crackers.

Refrigerate at least 1 hour before serving. Best kept if refrigerated.