Neiman Marcus Cookies

I recently ate at Mariposa, the restaurant inside Neiman Marcus at the Houston Galleria, and decided to try one of their famous chocolate chip cookies. It was pretty good but I wanted to see if I could make it myself. I used the recipe below from Brown Eyed Baker (adapted slightly) and they came out wonderful. My father-in-law claims that they were the best cookies I've made so far (and I've made a lot of different cookies). 

Neiman Marcus Cookies
makes ~30 cookies

Ingredients:
2 1/2 cups rolled oats
2 cups all-purpose flour
1 tsp baking powder
1 tsp baking soda
1/2 tsp salt
1 cup (2 sticks) unsalted butter, room temperature
1 cup white sugar
1 cup brown sugar
2 eggs
1 1/2 tsp vanilla extract
12 ounces semisweet chocolate chips
1 1/2 cups walnuts

Directions:
1. Preheat oven to 375 degrees F.
2. Blend the oats in a food processor to a fine powder. In a medium bowl whisk together the blended oats with the flour, baking powder, baking soda, and salt. Set aside
3. In a stand mixer with the paddle/scraper attachment, cream together the butter and both sugars until light and fluffy (3-4 minutes). Scrape down the sides and beat in eggs one at a time, beating well after each addition. Beat in the vanilla. On low speed gradually mix in the flour mixture, beating just until incorporated. With a rubber spatula fold in the chocolate chips and walnuts.
4. Using a medium cookie scoop, scoop cookies and place onto nonstick baking sheet about 2 inches apart. Bake for 10 minutes. Cookies should be lightly browned and set on the outside but still look a little undone in the middle. They will finish setting while cooling. Let cool 2-3 minutes on baking sheet than transfer to a cooling rack to cool completely. Store in an airtight container.