What can you do with under cooked fruit cake?

If your fruit cake is undercooked, you can return it to the oven to finish baking, checking for doneness with a toothpick. Alternatively, you can slice it and use it in recipes like trifle or bread pudding, where the moisture can be an advantage. Another option is to microwave individual slices briefly to warm them through. Just be sure to monitor the baking time closely to avoid further undercooking.