Easy Pineapple Upside-Down Cake (so moist!) 1/4 cup butter or margarine 1 cup packed brown sugar 1 can (20 oz) pineapple slices in juice, drained, juice reserved 1 jar (6 oz) maraschino cherries without stems, drained 1 box Betty Crocker® SuperMoist® yellow cake mix Vegetable oil and eggs called for on cake mix box