Best-Ever Oatmeal Cookies

Preheat oven to 350º and line two large baking sheets with parchment paper. In a large mixing bowl, combine butter, granulated sugar and brown sugar. Beat with hand mixer until light and fluffy. Add eggs and vanilla and mix until evenly combined. Add flour, oats, baking powder, cinnamon and salt and stir until just combined. Fold in desired mix-ins. Scoop tablespoon-sized balls of dough and place on baking sheets, about 2” apart. Bake until golden, about 12 minutes. Let cool on wire racks then top as desired.