*Does (Baking Pan) Size Really Matter?!
If all your 9-inch square baking pans happen to be held hostage by other holiday recipes at the moment, feel free to swap in a similar but slightly different size pan, although be advised that the resulting baking time and thickness of the buckle may vary slightly. In fact, a 9-inch round pan is about 25% smaller than a square pan, which means the resulting cake would be thicker and the baking time slightly longer. Conversely, a 9-by-13-inch baking pan is much bigger than a 9-inch square, so the cake is thinner and bakes faster. We’ve had testers and readers try this in all size pans with success, so rely on what you have available and keep an eye on the oven, testing the cake for doneness at approximately the time given in the recipe above, or just before or after, depending on the size of the pan.