Step 1

Preheat oven to 375ºF. Combine the flour, cornstarch, baking powder, baking soda, and salt in a mixing bowl.

Step 2

In a large mixing bowl beat butter and brown sugar until fluffy. Beat in the mashed banana, vanilla extract, and egg until well blended.

Step 3

Using a silicone spatula, stir the flour mixture into the banana mixture until well combined. Place banana chips in a small zip top bag. Lightly crush the chips using a rolling pin or meat mallet. Gently fold in the crushed banana chips and walnuts.

Step 4

Line a baking sheet with parchment paper or a silicone mat. Using a 1 Tbs cookie scoop, drop cookies onto the prepared baking sheet about 2 inches apart.

Step 5

Bake for 10 minutes or until cookies are lightly browned. Cool the cookies on the pan for 5 minutes before transferring them to a wire rack to cool completely.