Yes, you can grind whole mustard seeds to make your own mustard powder. Keep in mind that home-ground powder may have a coarser texture than store-bought versions. Equipment You Will Need.

If you’re using turmeric powder (responsible for American mustard’s bright yellow color) or any other spice or herb, this is your chance to pour them in and mix. 4. (Optional) Add water.

Black mustard seeds: Sharp and spicy and used to make Dijon mustard; To make prepared mustard, these seeds are either left whole or finely ground into a powder, and then mixed with water, vinegar ...

One step is crucial: In order to allow it to develop its sharp and spicy flavor before using, mix the mustard powder with cold water, and let soak for 10 to 15 minutes.