A cutter for a drill bit includes: a substrate for mounting the cutter to the drill bit; and a cutting table. The cutting table: is made from a superhard material, is mounted to the substrate, has an interface with the substrate at a lower end thereof, and has a working face at an upper end thereof. The working face has a protruding center section and a plurality of protruding ribs. Each rib extends radially outward from the center section to a side of the cutting table. Each rib has a triangular profile formed by a pair of inclined side surfaces and a ridge connecting opposing ends of the side surfaces. The working face further has a plurality of recessed bases located between adjacent ribs and each extending inward from the side.