If you only have round cake pans, head on over to the chart in Double Batches and Cake Pans Options: Everything you Need to Know –you can use sheet-cake pans or 6″, 8″, or 9″ round cake pans with my cake recipes. Just take extra care when baking. Round pans tend to have more batter in them than sheet pans and can be more prone to sinking or doming.