How long do you bake a doubled box cake mix?

Baking time may vary depending on your specific cake mix and oven, so it is best to follow the instructions on the cake mix box. In general, a doubled cake mix will require a longer baking time than a single cake mix. The original baking time suggested on the box might need to be increased by about 5 to 10 minutes. Keep an eye on the cake as it bakes and insert a toothpick into the center to check for doneness. When the toothpick comes out clean, the cake is ready.