The traditional Dijon mustard recipe includes white wine and ground brown mustard seeds along with salt and other spices. Dijon mustard has a pale yellow color and slightly creamy consistency. Black mustard seeds can also be used in making Dijon mustard.
At one time, any product called Dijon mustard had to be made in the Dijon region of France. Other products could be called "Dijon-style mustard" or simply "dijon mustard" with a lowercase "D". Today, however, the term Dijon mustard has become generic, so any mustard using the basic Dijon recipe can be called Dijon mustard.
Here's a basic Dijon mustard recipe.