Preheat oven to 400°.
Sprinkle salt and pepper over chicken. Combine chicken, flour, garlic powder, paprika, and thyme in a large zip-top plastic bag; seal, and shake to coat chicken with flour mixture. Remove chicken from bag; discard flour mixture.
Place chicken on a jelly-roll pan coated with cooking spray. Drizzle margarine over chicken. Bake at 400° for 50 minutes or until done.