350 degree oven. Whisk togeter flour, baking soda, and salt. Combine butter and both sugars and beat until creamy. Add egg and vanilla and beat well. Add flour mixture; mix well. Add oats, chocolate chips, cranberries and black walnuts; stir well.
Drop by rounded spoonfuls onto ungreased baking sheet. Bake 9 minutes until golden brown; cool one minute on baking sheet and then remove to wire rack. ENJOY!!