Preheat oven to 350. Line two baking sheets with parchment paper, or lightly grease.

In a bowl, whisk together oat flour, collagen, baking powder and salt. Set aside.

Using either a stand mixer with the paddle attachment or a hand mixer, beat the oil and sugar at medium high speed until light, about 1 1/2 minutes. Add apple sauce + bananas beating well after addition. Beat in vanilla extract. Scrape down sides of the bowl and beat 30 seconds more. At low speed, add the flour mixture and beat until just blended.

Fold in chocolate chips.

Refrigerate dough for at least 1 hour (or up to a week in the fridge.) Shape the cookie into 1 inch balls (about 1 tablespoon of dough.) Arrange balls on the baking sheets, spacing them 2 inches apart.

Bake cookies one sheet at time, 12- 15 minutes until tops are crinkly and they are puffed and lightly browned around the edges. Transfer cookies to a wire rack and cool completely.