Doubletree Hotel's Cookies

Preheat oven to 350 °F (175°C). In a medium bowl, combine flour, oats, baking soda, salt and cinnamon. Set aside. With an electric mixer, cream butter in large bowl. Add both sugars and beat on medium for 2 minutes. Add eggs one at a time, beating well after each addition. Add lemon juice and vanilla; mix well. Stir in flour mixture, mixing well. Add chocolate chips and nuts and stir to just combine. Drop by 1/4 cupfuls on non-stick baking pans, 2 to 3 inches apart. Bake for 13 to 15 minutes or until lightly browned around the edges. Cool; transfer to wire racks and cool completely. Store in tightly sealed container.