Step 1

Preheat the oven to 350° F. Line cookie sheets with parchment paper, set aside.

Step 2

Whisk together flour, oats, baking soda, salt, and cinnamon. Set aside.

Step 3

In a bowl of a stand mixer (or using a hand mixer), mix together the butter, brown sugar and granulated sugar on medium-high speed until light and fluffy, about 3 to 4 minutes. Beat in vanilla and eggs until light and creamy, about 1 minute Scrape down sides when necessary.

Step 4

Gradually add the flour oat mixture and mix until just blended. Stir in the walnuts and chocolate chunks.

Step 5

Use a medium cookie scoop to scoop dough and form into balls. Place on parchment lined cookie sheet and bake for 10 to 12 minutes. The edges will look lightly browned and the centers soft. Let the cookies cool on the cookie sheet for 3 minutes and then transfer to a cooling rack to cool completely.