Preheat Oven: Set your oven to 375°F (190°C) and prepare a muffin tin with liners or a light coat of cooking spray.
Mix Dry Ingredients: In a large mixing bowl, combine the oat flour, rolled oats, cocoa powder, baking powder, and salt. Stir to combine.
1 cup Oat Flour (95g), 1/2 cup Rolled Oats (42g), 1 tsp Baking Powder, 1/4 tsp Salt, 1/4 cup Cocoa Powder (30g)
Mix Wet Ingredients: In a separate bowl, mash the bananas until smooth. Add peanut butter, milk, eggs, and vanilla extract, whisking until fully combined.
2 Ripe Bananas (206g), 1/2 cup Natural Peanut Butter (128g), 1 cup Milk (237mL), 2 Eggs (110g), 1 tsp Vanilla Extract
Combine: Pour the wet ingredients into the dry ingredients, and gently stir until just combined. Be careful not to overmix!
Rest (Optional): Let the batter sit for 5 minutes to thicken slightly and allow the baking powder to activate.
Bake: Divide the batter evenly into your muffin tin and bake for 20 minutes, or until a toothpick comes out clean from the center.
Cool and Enjoy: Let the muffins cool for a few minutes before transferring to a wire rack. Enjoy warm or at room temperature!