The ingredients in McCoy’s Salt & Malt Vinegar Sharing Crisps include potatoes, sunflower oil, and a flavouring mix that gives the crisps their signature taste. The flavouring contains salt, natural flavouring, sugar, dextrose, citric acid, rice flour, dried yeast extract, maltodextrin, stabiliser (potassium phosphate), and dried barley malt vinegar extract.​

These crisps contain barley and may also contain traces of milk, soya, gluten, and mustard. For individuals with allergies to these ingredients, caution is advised.