Peanut Butter Oatmeal Chocolate Chip Cookies

and 1/2 cups (180g) all-purpose flour (spoon & leveled)

baking powder

baking soda

salt

(2 sticks; 235g) unsalted butter, softened to room temperature

granulated sugar

packed light or dark brown sugar

large eggs, at room temperature

creamy peanut butter

pure vanilla extract

old-fashioned whole rolled oats

and 1/2 cups (450g) semi-sweet chocolate chips, plus more for topping if desired