Before you start, set your oven to preheat to 400 degrees F. Now you are going to want to grease your cookie sheets. Now sift the flour, baking powder, salt, and baking soda together, and then set this aside.

Now cream the butter with the sugar until it is all light and fluffy. Now you can beat in the eggs, and add in your vanilla, and then mix in your mashed bananas. Add the flour mixture now, and stir until it is all completely combined. Stir in the chocolate chips here, and drop spoonfuls of the dough onto the cookie sheets you prepared earlier.

Bake your cookies in the oven you had preheated between 12 and 15 minutes.