It came out good, which means I can share the recipe with you now!
For a 1.5 pound loaf:
1/2 cup mashed ripe banana (1 banana yielded this for me, and when it has some brown skin it's perfect for baking!)
1/2 cup Hershey's Cinnamon Chips (chocolate chips would also be amazing)
1/2 cup milk
2 tbsp butter, cut in to pieces
1 cup bread flour
2 cups whole wheat flour
2 tbsp brown sugar
3/4 tsp salt
1 and 1/4 tsp active dry yeast
Select the whole wheat /whole grain cycle on your machine.
Note that I put the cinnamon chips in first - I did this because my whole wheat cycle preheats the the pan before it mixes, so it made my chips all melty before mixing. There are no chips left, just the cinnamon sugary flavor throughout. If you would prefer your chips to stay intact, you could put them in last (which is what the recipe called for in the first place), or put them in after your bread is partially kneaded.
I had a hard time finding the Hershey's Cinnamon Chips in stores, but finally had success from Amazon! I had to order several bags of them, but I'm sure I can figure out what to do with them! :D