Stoneground mustard: "The best substitute for Dijon is stoneground mustard, which is also made from spicy brown mustard seeds ...

Here are some other substitutes ... from mild to spicy, but it’s sweeter than Dijon mustard. Add vinegar if you want a tangier taste. Stone Ground Mustard: Made from brown mustard seeds, this ...

It is a sweeter and less pungent type of mustard sauce. If you like your sauce hot, try this spicy brown mustard. This sauce uses brown mustard seeds and can best be paired with meaty dishes.