Baking flat cake layers is a common challenge faced by many bakers. A few simple techniques can help achieve perfectly flat cake layers. One important tip is to properly prepare the cake pans by greasing them with a layer of shortening and then sprinkling flour to prevent sticking. Another technique is to use a heating core or flower nail in the center of the cake to ensure even heat distribution. Leveling the cake layers once they are cooled can also help to create a flat surface. These techniques will help bakers achieve professional-looking cakes with flat layers.