Grey Poupon Debuts La Moutarde Vin, a White Wine that Transforms Lunch into a Feast Grey Poupon has always been considered one of the “fancier” grocery store mustards, but what if it was used to make wine? Grey Poupon has introduced La Moutarde Vin, a white wine infused with seeds of the company’s famous mustard. In fairness, Grey Poupon uses white wine to make their Dijon mustard, unlike other brands using vinegar. La Moutarde Vin is available for a limited time at GreyPouponWine.com for $30. Would you try mustard-infused wine? What is your favorite condiment for sandwiches?