This DoubleTree-style cookie recipe replicates the iconic cookie served at DoubleTree hotels, featuring a delicious blend of all-purpose and oat flours, semi-sweet chocolate chips, and walnuts. These soft, chewy cookies are perfectly balanced with a hint of cinnamon and lemon juice for extra depth of flavor. The dough rests overnight to enhance the texture, resulting in a rich, satisfying treat that’s perfect for any occasion.