Walkers Crisps. Walkers now seem to have a near monopoly when it comes to the potato crisp and its variations. Of their basic crisps, Ready Salted, Salt & Vinegar, Worcester Sauce and Prawn Cocktail are ok for vegans. Also Square Crisps in Ready Salted and Salt & Vinegar, and Salt n Shake.Sadly, Monster Munch is Not Vegan.s the name possibly suggests, these are cheap, nasty blobs of additive-ridden sugar and fat. Clearly labelled âsuitable for vegansâ, they are however NOT suitable for anyone looking for a healthy option.