Preheat oven to 350°F.
Beat butter and sugars until creamy. Add eggs and vanilla – beat well. Add combined flour, baking soda, salt and cinnamon – mix well. Stir in chocolate chips and oats – mix well. Drop by rounded tablespoons on ungreased cookie sheet and bake 10 – 12 minutes or until golden brown.
Cool one minute on cookie sheet – remove to wire rack.
Cool completely and store tightly covered.