Preheat oven to 350 degrees
Mix butter, mashed banana, egg, and vanilla extract
Add flour, baking powder, salt, and chocolate chips
Line a baking sheet with parchment paper. Using a cookie scoop, scoop out 1.5-inch rounds of cookie dough onto the sheet.
Press each cookie down slightly with a fork
Bake for 10-12 minutes.
Cool and Serve