A coating apparatus is described for coating the surface of a center or core of chewing gum with a sugarcoated layer. The apparatus includes a cylindrical fixed tub having a bottom and an inner fixed circumferential wall. A rotating plate is mounted on the bottom of the fixed tub so as to be coaxial with the fixed tub. The surfaces of the rotating plate and the fixed tub are determined to allow the smooth transfer of the gum centers from the rotating plate to the inner fixed circumferential wall of the fixed tub. The inner fixed circumferential wall of the fixed tub is configured with ridges so as to reduce the tendency of the gum centers to adhere to the wall and to increase the coating area and the drying area of the gum centers.