Toast pecans. Set aside.
Using a food processor, pulse oatmeal until finely ground.
Preheat oven to 325⁰F.
In a large bowl, cream together softened butter, white sugar, and brown sugar until well combined.
Beat in eggs one at a time, and stir in vanilla extract.
In separate bowl, mix together flour, oats, salt, baking powder, and baking soda until well combined.
Stir dry ingredients into creamed butter and sugar mixture and mix until just combined.
Stir in chocolate chips and toasted pecans.
Drop by rounded teaspoons on greased cookie sheets or non-stick baking mats.
Bake for 10 minutes per batch.
Remove cookies from trays after 2-3 minutes and place on cooling racks before serving warm.