How Many People Does a Single Layer Sheet Cake Feed?
While there are standard sizes for sheet pans, there can be a variance as you can see. Therefore, it is good to have a general idea on how many servings you can get from a pan, so you know how much cake to make or buy.
While there are formulas you can use to determine how many pieces you can get when cutting various sizes as a general rule of thumb, a good estimate is that a half-sheet cake will likely serve 36 using 2 inch x 3 inch pieces.
You can always adjust the size of the serving based on how many people you plan to serve with the cake.
If you are going to feed a large number of people, you can plan on additional cakes to make sure you have enough cake for a larger crowd.