How long to bake a cake for if the oven was 25 degrees too low?

If the oven was 25 degrees too low, the baking time will need to be increased. The exact amount of time will depend on the type of cake and the size of the pan. As a general rule, you should increase the baking time by about 25%. For example, if a cake normally bakes for 30 minutes, you would bake it for 37.5 minutes in an oven that is 25 degrees too low.

It's important to keep an eye on the cake while it's baking, and to use a toothpick or cake tester to check for doneness. The cake is done when the toothpick or cake tester comes out clean.