Preheat oven to 350°F (177°C). Line a 9-inch square baking pan with parchment paper with enough overhang on the sides to easily remove the bars from the pan. Set aside.
In a large bowl or in the bowl of your stand mixer, mash the bananas. On medium speed, beat or whisk in the remaining ingredients in the order listed. Batter will be a little thick, but still pourable.
For this step
Banana 230 g
Peanut butter 125 g
Coconut sugar 50 g
Applesauce 60 g
Almond milk 120 ml
Oats 215 g
Baking powder 1 tsp
Salt ½ tsp
Cinnamon 1 tsp
Vanilla extract 1 tsp
Chocolate chips 180 g