1 stick butter, softened
1 stick unsalted butter, softened
1 cup brown sugar
1/2 cup granulated sugar
1 1/2 teaspoons vanilla extract
2 extra-large eggs, room temperature
2 1/2 cups all-purpose flour
1 1/2 teaspoons baking soda
1 teaspoon salt
1/4 teaspoon cinnamon
1/3 cup quick-cooking oats
2 cups semisweet chocolate chips
3/4 cup chopped walnuts
Preheat the oven to 350ºF.
Place butters, sugars, and vanilla extract in the work bowl of a stand mixer. Cream together until the ingredients are light and fluffy, about 5 minutes. Add eggs, one at a time, beating until the mixture is smooth.
In a separate bowl, combine the flour, baking soda, salt and cinnamon. Gradually incorporation the dry mixture into the butter-sugar mixture. Fold in the oats, then the chocolate chips and walnuts.
Scoop out large balls of dough with a cookie scoop or ¼ cup measure, placing 2 inches apart on a parchment-lined baking sheet. Bake for 15-17 minutes, or until the edges are lightly golden but the center of the cookie is still a bit soft.
http://pattietierney.blogspot.com/2016/03/copycat-doubletree-chocolate-chip.html