Preheat oven to 350°.
Lightly spoon flour into dry measuring cups; level with a knife. Combine flour and next 7 ingredients (flour through pepper) in a medium bowl. Beat sugar, butter, and vanilla in a large bowl with a mixer at medium speed until light and fluffy. Add egg; beat well. Stir in flour mixture and oats.
Drop by level tablespoons 2 inches apart onto baking sheets coated with cooking spray. Bake at 350° for 12 minutes or until crisp. Cool on pan 2 to 3 minutes or until firm. Remove cookies from pan; cool on wire racks.