Mix flour, baking powder, baking soda, and salt in a bowl.
In a stand mixer, beat together butter and sugars. Add eggs, then vanilla. Alternatively, you can mix them all together by hand in a large bowl.
Add flour mixture to the sugar-butter mixture. Stir until combined. Add coconut and oats. Stir in until dispersed evenly. I like to use my hands for this last step.
Drop from a tablespoon onto a parchment paper lined cookie tray. Bake for 15 munites, or until tan at the edges and golden brown all over.