Prepare two large sheet pans by spraying with cooking spray or lining them with parchment paper. Set aside.
Using a stand or hand mixer, beat together the salted butter and white sugar. Beat for 2-3 minutes to incorporate plenty of air. It should be light and fluffy.
Mix in the mashed ripe bananas, Greek yogurt, egg, and vanilla extract. Beat for 2-3 minutes again.
In a separate bowl, combine the all-purpose flour, cinnamon, baking soda, baking powder, salt, and nutmeg. Stir well.
On low speed, add the flour mixture into the batter until just barely combined.
Fold in the chocolate chips.
Use a cookie scooper to scoop two-inch balls of dough onto the sheet pan (I used a 2-inch cooking scoop for this step). Leave two inches between each cookie.
Bake cookies in the oven for 10-12 minutes or until cookies have puffed up and the edges are lightly golden. Plate and serve.