Most of the doughnuts were hard, but I had a friend drop off a few doughnuts for me to add to this and they weren’t as old. The staler the doughnuts the more structure (less mushy) for a bread pudding.
As stated, I used cake donuts. I used a combination of glazed, crumb, and old fashioned.
Have leftover donuts at work? Save them in a freezer bag until you have enough to make some donut bread pudding muffins.
In the pan apples were cooked in, test your batter by dropping a small amount and cook to taste. If batter needs more sugar you can add it or any additional seasoning needed.
This could also be done in a 9X13 pan.
If you need to dry out your donuts, place them in a low oven until they are hard.