Preheat oven to 400°F. Line a baking sheet with parchment paper.
In a large mixing bowl, add flour, baking powder, baking soda, salt, cinnamon, nutmeg, and rolled oats. Whisk to combine.
To the bowl of a stand mixer fitted with the paddle attachment, add butter and brown sugar. Cream together on low speed until smooth.
Add eggs, vanilla, and molasses. Mix,(stopping to scrape down the side of the bowl as needed), until all ingredients are fully incorporated.
With the mixer still on low speed, slowly add the dry ingredients until fully incorporated.
Scoop out the dough, using a 2-tablespoon scoop. Roll each into a ball and then place on the lined baking sheet and gently press to slightly flatten the cookies.
Bake for 7-8 minutes. They may look slightly doughy, and that is okay.
Let the cookies rest on the baking sheet for a couple of minutes before transferring them to a wire rack to cool completely. Enjoy!