I found this great two ingredient + add-ins cookie recipe online!
2 old bananas (or 1 cup pureed peaches in the summer, or it's about to be fall so you can use 1 cup pure pumpkin)
1 cup oats
add-ins dried fruit, nuts, cinnamon, chocolate chips :)
Mash bananas into oats. Add in add-ins ;) . Form into cookies on a greased cookie sheet. Cook at 350 degrees for 15 min.