How to bake a large sheet cake

Written by robert adams
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How to bake a large sheet cake
Mixes for sheet cakes come in a variety of flavours, including chocolate. (cake image by max blain from

Sheet cakes are among the more common cakes baked at home. Most grocery store cake mixes are set up to be baked as sheet cakes, using a standard-sized rectangular baking pan that is 9 inches by 13 inches. You'll generally be able to serve 12 to 28 people with a standard-sized sheet cake, depending on how big you cut the pieces, of course. If you need to create a larger sheet cake to serve even more people, you'll need to consider a few factors before you begin.

Skill level:


  1. 1

    Determine the number of people you need to feed with your sheet cake. This will help you determine which cake mix to buy, which pan to use and whether you'll be able to accomplish your goal with only one cake.

  2. 2

    Choose a baking pan to help you create your cake. The bigger the pan, the bigger the cake you'll be able to bake.

  3. 3

    Decide which recipe you'll use, choosing either one that calls for a pre-made cake mix or one that requires you to bake your cake from scratch. This will play a large role in determining exactly which ingredients you need to purchase and how much of them you'll need.

  4. 4

    Calculate your measurements before you head to the store to save yourself time and ensure that you buy the proper amount of each ingredient. If you're modifying a cake recipe to fit a larger pan, for example, you'll need to do some math to account for the difference in size. Make sure you're accurate, or your cake won't turn out well.

  5. 5

    Purchase all the ingredients for your sheet cake according to the recipe you've selected. Pre-made cake mixes will include a listing of additional ingredients you'll need right on the side of the box or bag.

  6. 6

    Bake your cake according to the recipe you've chosen, taking care to follow each step and allowing your oven to heat up to the proper temperature before putting in the cake.

  7. 7

    Decorate your cake after you've allowed it to bake and cool, using frosting, fondant or whichever decorative topping you've chosen. You can purchase small tubes of frosting that will allow you to easily write and draw on top of your cake.

Tips and warnings

  • Your sheet cake doesn't need to be wider and longer to be bigger. Try layering your cake to make it larger and to keep the baking process manageable. For example, if you have a standard 9-by-13-inch baking pan, simply bake two separate cakes and then stack one on top of the other before frosting them. Frost the two cakes together --- and include a fruit filling in between the layers if you want to add some flavour --- and you'll have a sheet cake that's double the regular size.

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