The serving amount depends on how big the pieces are cut into.
You can use two cake recipes for that size pan.
A 12" x 18" cake pan will make 72 servings.
The depth of the pan is not as important (most pans are between 1 and 4 inches deep), but it is the length and width that are more important in determining how many people a cake can feed.
You usually cook a cake for around 15 minutes but if you have a knitting needle or somethiit long simlar stick it in the cake and if it comes out clear its cooked if not it needs a bit longer.
It depends on how deep the pan is.
Depends on how big you cut the pieces. If you cut 2x2 inch pieces, a 12x18 cake will yield 54 servings.
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Sheetcake pans come in a variety of sizes and depths. What size you want to use depends on the number of servings you want. Also, make sure the pan will fit in your oven. Not all full sheet cake pans fit in all ovens.
How deep is the pan? 2" or 3"? It makes a huge difference.
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for an 14 in round cake pan, you only need 1 box
Yes, usually a tube cake pan is a good substitution for a fluted (Bundt) cake pan.