Two stalwarts of the supermarket shelves, Heinz and Walkers, have once again teamed up to bring back Heinz Scarily Good Monster Munch Mayonnaise. Heinz Mayo and Pickled Onion Monster Munch will make for an interesting combo (Picture: Heinz/Walkers)Popular Instagram foodie reviewer, @johns_snackreviews gave the condiment a 9/10 and called it ‘absolute genius’. It’s identical to pickled onion monster munch… it’s full blown identical. It’s a limited run, back from 22 September — with Heinz and Walkers so far keeping the end date under wraps. Thiago Rapp, director of taste elevation at Kraft Heinz, said: ‘When we first launched Heinz [Scarily] Good Monster Munch Mayo last Halloween, we were amazed by the reaction, fans loved it.