Preheat the oven to 180C/350F. Line a large baking sheet with parchment paper and set aside.
In a mixing bowl, add your oats, protein powder, banana, peanut butter, and maple syrup and mix until a thick dough remains. Fold through your favorite mix-ins.
Using a 2-inch cookie scoop, scoop out portions of the dough and place them on the lined sheet. Use a knife to shape the dough into large, cookie shapes.
Bake the cookies for 10-12 minutes, or until the edges are golden brown.
Remove the cookies from the oven and let them cool completely.
Notes
See the post for 10 flavor options to try. * You can also use applesauce.** You can use almond butter, tahini, or sunflower seed butter. TO STORE: As the base of these cookies use banana/applesauce, they need to always be stored in the refrigerator, covered. They will keep well for up to one weekTO FREEZE: Place leftover cookies in a ziplock bag and store them in the freezer for up to 6 months.