❶ Preheat the OvenPreheat your oven to 350°F (175°C).❷ Prepare the Cookie DoughIn a large bowl, beat together the butter and sugars until creamy.Add the eggs and vanilla, then beat well.In a separate bowl, combine the flour, baking soda, cinnamon, and salt; mix well.Gradually add the dry ingredients to the butter mixture, mixing until well combined.Stir in the oats and raisins (if desired), and mix thoroughly.❸ Shape the CookiesDrop rounded tablespoonfuls of dough onto ungreased cookie sheets, spacing them about 2 inches apart.❹ BakeBake for 8 to 10 minutes or until the cookies are light golden brown.❺ Cool the CookiesAllow the cookies to cool on the cookie sheets for 1 minute before transferring them to wire racks to cool completely.