1/2 cup rolled oats 2 1/4 cups all-purpose flour 1 1/2 teaspoons baking soda 1 teaspoon salt 1/4 teaspoon cinnamon 1 cup (2 sticks) butter, softened 3/4 cup packed brown sugar 3/4 cup granulated sugar 1 1/2 teaspoons vanilla extract 2 eggs 3 cups semisweet chocolate chips 1 1/2 cups chopped walnuts
Preheat oven to 350°F. In a food processor or blender, pulse oats until fine.
In a large bowl, combine oats with flour, baking soda, salt, and cinnamon.
In another large bowl, with an electric mixer, cream together butter, sugars, and vanilla. Add eggs and mix until smooth. Stir in oats mixture; mix well. Stir chocolate chips and nuts into dough; mix well.
Spoon rounded 1/4 cup portions onto ungreased baking sheets, about 2 inches apart.
Bake 13 to 15 minutes, or until cookies are light brown and soft in the middle.
When cool, store in a sealed container to keep soft.