Preheat oven to 350 degrees
In a large bowl, mash the banana and then add the peanut butter and eggs. Mix well.
Stir in approximately 3 and a half cups of the ground oats. You are looking for a dough like consistency. It should be firm, but not crumbly. If the dough is too sticky, keep adding more ground oats until you can handle it without it sticking to your hands.
Place a large piece of parchment paper on the counter and sprinkle with a generous amount of remaining ground oats. Place the dough on the counter and sprinkle the top with oats. Roll out to about ¼ inch thickness and cut into shapes. Scoop scraps together and repeat. Don’t worry about overworking the dough as there is no gluten.
Place on parchment lined baking sheet. You can place these very close together as they do not spread when baked.
Place cookies in the oven and bake 40 min until cookies are dry and golden. If your dog likes a softer cookie, you can bake a little less and if you want very crunchy cookies, you can bake a little longer
If you have baked your cookies crisp, they will store in an airtight container at room temperature for a couple weeks. For softer cookies, it is recommended to store in the refrigerator or freezer