Square Cake Cooling Rack functions as a way to cool down baked goods, and a handy place to store baked goods until you serve, frost or pack them. Cooling racks come in many different sizes and are usually made of metal. Small metal bars run across the rack, allowing air to circulate not only on top of cookies or cakes, but also underneath them. Therack may also have bars running in both directions or be composed of fine metal net if you're cooling small items