PLACE semi-sweet chocolate and white chocolate in separate medium microwaveable bowls. Microwave until completely melted, following directions on package. Add peanut butter to white chocolate; stir until well blended. Crumble half the cookies over chocolate in each bowl; mix well.
DROP spoonfuls of the chocolate mixtures onto waxed paper-covered baking sheet, alternating the colours of the chocolates. Swirl gently with knife.
REFRIGERATE 1 hour or until firm. Break into 14 pieces. Store in airtight container in refrigerator.
serving size = 1 piece (36 g)