Cinnamon Chip Oatmeal Cookies

old-fashioned oats 1 cup all-purpose flour 3/4 tsp. ground cinnamon 3/4 tsp. sea salt 1/2 tsp. baking soda 1/2 cup butter, room temperature 1/2 cup granulated sugar 1/2 cup light brown sugar, packed 1 egg 1 tsp. vanilla 1 cup cinnamon chips