Soda Cracker Chocolate Candy
["1 c. butter", "1 1/2 c. semi-sweet chocolate chips", "1 c. packed brown sugar", "1 1/2 c. chopped walnuts"]
["Line a 15 x 10-inch baking pan with foil and coat with nonstick cooking spray.", "Place crackers in rows on foil."]
["butter", "semi-sweet chocolate chips", "brown sugar", "walnuts"]