Hi Mary Beth! We would recommend doubling the recipe so that it will fit in your pan. You'll only want to fill the pan two-thirds of the way full though so it doesn't spill over the sides — if you have any extra batter you can use it to make a couple cupcakes. Happy baking! Morgan@KAF
March 15, 2019 at 3:26pm
In reply to Hi! If I wanted to use this recipe for a 12x18 sheetcake, shoul… by Mary Beth (not verified)