The ingredients in Monster Munch Roast Beef include maize and rapeseed oil as the base, with the flavouring coming from a special roast beef seasoning. This seasoning contains wheat flour (fortified with calcium, iron, niacin, and thiamin), hydrolysed soya protein, whey permeate (from milk), flavourings, rusk made from wheat, sugar, various flavour enhancers like monosodium glutamate and disodium 5′-ribonucleotides, onion and garlic powders, ammonia caramel for colour, and spices. These ingredients combine to deliver the distinct, savoury taste that fans of the snack recognize instantly.

In terms of allergens, Monster Munch Roast Beef contains milk, soya, and wheat. It may also contain traces of barley, celery, cereals containing gluten, and mustard, making it important for those with allergies or dietary restrictions to read the label carefully. Despite these allergens, the product is suitable for vegetarians and contains no artificial colours, which appeals to health-conscious snackers looking for better-for-you options.