Preheat Oven: Preheat your oven to 350°F (175°C). Grease or line an 8x8-inch baking pan with parchment paper.

Mix Ingredients: In a mixing bowl, combine the mashed bananas, peanut butter, oats, and honey. Mix until well combined and a thick batter forms.

Spread in Pan: Pour the mixture into the prepared baking pan and spread it evenly, smoothing the top with a spatula.

Bake: Bake in the preheated oven for 15-20 minutes, or until the bars are set and the edges are lightly golden.

Cool and Cut: Once baked, remove from the oven and allow to cool in the pan for about 10 minutes. Then lift the bars out using the parchment paper and transfer them to a wire rack to cool completely before cutting into squares.