2Season chicken with salt and pepper. Place chicken, skin sides down, in an ungreased 13x9x2-inch rectangular pan.
3Stir together the mayonnaise, Italian dressing, Italian seasoning, and thyme until well blended. Brush half of the mayonnaise mixture over chicken; cover and refrigerate the remaining mayo mixture.
4Cover the baking pan, and bake 30 minutes at 375°. Turn chicken; brush with remaining mayonnaise mixture. Bake uncovered about 30 minutes more, or until juice of chicken is no longer pink when centers of thickest pieces are cut. (If chicken begins to brown too quickly, cover with aluminum foil.).
5Discard any remaining mayonnaise mixture.
Serve chicken immediately, while still hot out of the oven.