Best-Ever Chocolate Chip Cookies
["1 1/2 c. sifted all-purpose flour", "1 tsp. baking soda", "1 tsp. ground cinnamon", "1 c. (2 sticks) butter, softened", "1/2 c. firmly packed light brown sugar", "1 c. granulated sugar", "1 large egg", "1 tsp. vanilla extract", "1 1/2 c. old fashioned rolled oats", "1 c. semi-sweet chocolate chips"]
["Mix together flour, baking soda and cinnamon.", "Beat together butter, brown sugar and granulated sugar at medium speed until light and fluffy.", "Beat in egg and vanilla.", "At low speed, beat in flour mixture until blended.", "Fold in oats and chocolate chips. Cover with plastic wrap; chill for 1 hour."]
["flour", "baking soda", "ground cinnamon", "butter", "brown sugar", "sugar", "egg", "vanilla extract", "rolled oats", "semi-sweet chocolate chips"]