Yum! I love making donut muffins but have not seen this recipe before.
I found these on pinterest and love them - yours sound pretty similar, but these have more spices and vegetable oil (could possibly sub in applesauce though).....http://cravingchronicles.com/2010/10/11/baked-pumpkin-spice-donut-holes/
Liz, I just made banana bread the other day and subbed out some of the butter for applesauce. I forgot how well that works!