Step 1

Cream butter, sugar, and brown sugar in a stand mixer bowl on medium speed for about two minutes.Add eggs, vanilla, and lemon juice, blending with mixer on low speed for 30 seconds, then medium speed for about two minutes, or until light and fluffy, scraping down bowl.

Step 2

With the mixer on low speed, add flour, oats, baking soda, salt, and cinnamon, blending for about 45 seconds. Don’t overmix.

Step 3

Stir in chocolate chips and walnuts.

Step 4

Portion dough with a scoop (about three tablespoons) onto a baking sheet lined with parchment paper, about two inches apart.

Step 5

Preheat oven to 300°F. Bake for 20 to 23 minutes, or until edges are golden brown and center is still soft. Remove from oven and cool on baking sheet for about one hour.