Step 1

Preheat oven to 350°F (177°C). Line an 8 inch by 8 inch baking pan with parchment paper.

Step 2

Add bananas to a large mixing bowl and use a fork or whisk to mash until the bananas are finely mashed.

Step 3

Add the eggs to the mashed bananas and whisk until evenly combined and no egg streaks remain.

Step 4

Add the oat flour and baking powder. Gently stir and fold with a spatula until they are fully incorporated and there are no pockets of oat flour in the batter. If adding any mix-ins, stir them in now. (For the photos, I added some bittersweet chocolate chips).

Step 5

Pour the batter into the prepared pan and use a spatula to spread it evenly across. (I also sprinkled some additional bittersweet chocolate chips on top for decoration.)

Step 6

Bake for 30-40 minutes or until the bars are done. The surface should be golden brown and puffed. When you apply light pressure to the surface, it should also bounce back a little and not completely sink in. The bars will initially be very puffy but they will sink down and level as they cool. Let bars cool completely before cutting with a sharp knife and serving. Keep any leftover uneaten bars stored in an airtight container in the fridge.