If you are using a 2" deep cake pan you would need 13.5 cups of batter.
6 cups for one layer
It depends on how deep the cake pan is.
It will probably take 1-1/2 boxes. Fill the pan roughly half full & use the rest for cupcakes.
10-12 cups of batter
If you are using a 2" deep cake pan you would need 13.5 cups of batter.
6 cups for one layer
1/2 way filled
It depends on how deep the cake pan is.
1/2 full
You can use two cake recipes for that size pan.
This occurs because the batter is spread out and cooks faster. The batter is basically less in each cup than it is in a whole cake pan. So, the cake bakes more quickly.
It will probably take 1-1/2 boxes. Fill the pan roughly half full & use the rest for cupcakes.
How deep is the pan? 2" or 3"? It makes a huge difference.
All you have to do is pour the cake batter into the cake pan and cook it in the oven according to the time and temperature that the recipe specifies.
So the batter has something to bake in.
10-12 cups of batter