I called Hostes yesterday regarding the Donettes. I was told that all of the bakeries are peanut free.
Currently there is one bakery that makes the banana walnut mini-muffins, bakery #2300.
The remaining bakeries: 2100, 2200, and 2400 do not make those mini-muffins.
The rep did say that always read the packaging before purchasing as the bakeries may change.
When in doubt on a product from any company, call the manufacturer directly.
If you aren't satisfied with their answer, don't buy the product.