Whisk flour, baking soda, and salt together in a bowl. Set aside. Whisk brown sugar and granulated sugar together in a mixing bowl. Whisk in melted butter until combined. Whisk in egg and yolk and vanilla until smooth.
Gently stir in flour mixture with a sturdy spoon until a soft dough forms. Fold in chocolate chips. Preheat the air fryer or toaster oven on the bake setting to 350 degrees.