Preheat Oven: Preheat oven to 375℉ and line baking trays with silicone mats or parchment paper.
Mix Dry Ingredients: In a medium-sized bowl, add flour, baking soda, baking powder, salt, and blended oats and mix. Set aside.
Cream Butter and Sugar: In a large mixing bowl, add the softened butter and sugars and use a hand mixer to cream on high for 3 minutes. Add the eggs and vanilla and mix until well combined.
Create Dough: Add the dry ingredients to the creamed ingredients, adding about a cup at a time while mixing on medium.
Add Chocolate: Once all of the flour is incorporated, add chocolate chips, chopped chocolate, and chopped walnuts to the dough and fold them in.
Bake: Roll out 1 1/2 inch dough balls and line them on the baking trays 2 inches apart. Bake for 10-12 minutes, or until the edges of the cookies begin to brown. Let cool on wire racks.
Enjoy!