We grow our own sweet potatoes. After the frost we dig them (Haley loves to help). They come in sizes from finger size to as large as an average man's forearm. Haley gets the small ones from time to time until they run out. The huge ones would be good for sweet potato pie, candied yams, etc. which we don't eat. I got the brilliant idea to make treats for Haley.
I cooked a couple of the giant sweet potatoes in the microwave and peeled them. Then I cut them into chunks and put in my Kitchenaid stand mixer and mixed them until no lumps remained. Then I added a couple of cut up bananas continuing to mix until smooth.
The next step was to use a cake decorating tool to quickly form them on parchment lined baking sheets.
Baked these in the oven for 3+ hours then finished them off in my dehydrator for several hours. (The sweet potato/ banana mixture is a consistency that does not lend itself to dehydrating without the oven baking.
Haley loves these "cookies".