The cast aluminum bakeware provides fine details and superior baking performance. The heat reflective exteriors allows for uniform browning so as to enhance the unique design. Bake mouth watering 3/4 cup popovers and over-sized muffins. Also perfect for crown muffins, Yorkshire pudding, and molded desserts. Our center heat vents allow hot air to surround the popover for even cooking. Heavy cast aluminum assures it will not warp and provides long-lasting service. Non-stick finish for easy cleaning.