Step 1

Preheat the oven to 350F (180C). Line a large baking sheet with parchment paper.

Step 2

In a small or medium bowl, finely mash the banana (so that no large lumps remain)

Step 3

Add the peanut butter. Stir until completely blended into a dough. Divide the dough into 10 equal portions and roll each into a ball (about 1 inch/2.5 cm each).

Step 4

Place the dough balls on the prepared baking sheet, spacing 2 inches apart. Flatten with the tines of a fork (making cris-cross hatch marks). Alternatively, flatten with fingers, spatula, or a flat-bottom-glass until the cookie dough balls are about 2 inches (5 cm) in diameter.

Step 5

Bake the cookies in the preheated oven for 8 to 10 minutes until deep golden brown and the edges of the cookies appears dry (the cookies will look somewhat oily while warm).

Step 6

Remove from oven and cool 5 minutes on the baking sheet. Transfer cookies to a cooling rack and cool completely.