Cream together butter and sugars. Add eggs and vanilla and mix until fluffy and smooth.
Put small amounts of oats in a blender and grind until it turns into a coarse meal.
In a separate bowl, whisk together flour, ground oats, salt, baking powder and baking soda.
Mix one cup of dry ingredients at a time into the creamed wet ingredients.
Stir in chocolate chips and nuts.
On an ungreased cookie sheet, spoon a tablespoon of dough for each cookie and place 2 inches apart. Bake at 375 degrees for 6-8 minutes, until tops are lightly golden. Let cool on the sheet for about 2 minutes before removing with a spatula.
Notes
As with any other baked good, this task is finished a lot faster with my Bosch Mixer. (Affiliate Link) Oh, how I love my Bosch!