Preheat oven to 375°F. Beat butter and sugars in large bowl with electric mixer on medium speed until well blended. Add egg; mix well. Add flour, oats, baking soda and cinnamon; beat on low speed just until blended. Stir in chocolate and raisins. Drop level tablespoonfuls of dough, 2 inches apart, onto ungreased baking sheets.Bake 9 min. or until lightly browned. Cool on baking sheet 2 min. Remove to wire racks. Cool completely. Store in tightly covered container at room temperature.