Here's the absolute most easiest dog treat and only one ingredient! Sweet potatoes are safe for dogs and a fresh, healthy, treat for them. Simply get a sweet potato and peel it. (It's so much easier than cooking it first; FYI for Thanksgiving)
After you peel, slice the sweet potato like chips. Lay out evenly on a cooking sheet and cook at 350 degrees for 25 minutes on one side then flip and 25 minutes on the other. If they still aren't dried out enough keep cooking it a bit more. Store and keep them like you would any normal cooked vegetables. Miles loves them!