Bisto Onion Flavour Gravy Granules Bisto is The Nation's favourite gravy so we know how important it is to making your meal a success. That's why we're dedicated to helping you get the gravy right every time. A smoother gravy ... Bisto has a smooth texture so it's easier to mix, giving you perfect gravy to pour over all your favourite meals. - Prepare and Use: Put 4 heaped 5ml spoons (4 heaped tsp) of Bisto granules into a measuring jug. Make up to 280ml (1/2 pint) with boiling water, stirring all the time. For extra thick gravy, just add more granules