The secret ingredient of white wine makes all the difference to the flavour of our Mustard! Authentic French Mustard made in Dijon using a traditional and authentic recipe since 1777. Wonderfully versatile: Grey Poupon is the only Mustard worth cooking with. Add a spoonful of flavour to your cooking or a dollop to your side of plate! Delicious French Mustard with white wine: Grey Poupon is the authentic French Dijon and Wholegrain Mustard made in Dijon.