Step 1

Preheat the oven to 400F (200C). Generously spray a 9-inch square pan with nonstick cooking spray.

Step 2

In a large bowl, finely mash the bananas. Add the oats (and any other flavor enhancements, like salt, vanilla, sweetener). Let the dough stand for 15 minutes while the oven preheats.

Step 3

Stir in any optional mix-ins, if using. Spread the batter into the prepared pan, smoothing the top.

Step 4

Bake in the preheated oven for 19 to 24 minutes until golden brown and the center is set.

Step 5

Cool completley in the pan. Remove the bars from the pan and cut into 8 big bars.