How to Make Dijon Mustard

1 . Stage

Soak and refrigerate mustard seeds: In a small plastic container or glass bowl (do not use metal), soak the mustard seeds in 5 1/2 ounces of the distilled white vinegar. Cover and set in the refrigerator for 12-24 hours. Soaking allows the mustard seeds to soften and plump up, which will make them break down easier during the blending process. 

2 . Stage

Strain the mustard seeds: Using a sieve, strain the mustard seeds, and discard any vinegar. The liquid will be too bitter to use.

3 . Stage

Blend the mustard seeds: Place the strained mustard seeds in a blender. Add the remaining 1 1/2 ounces of distilled white vinegar, white wine, sugar, and salt into the blender as well. Blend at a low setting for 20 seconds, then slowly increase to a high setting and blend for 15 seconds. Scrape down the sides of the blender. The consistency of the mustard will have thickened slightly. Blend at low setting for 15 seconds, slowly increasing to a high setting and blend for 20 to 30 seconds. The consistency will be similar to a thick cake batter. If you prefer a smoother texture, blend for another 20 to 30 seconds at a medium to high setting.

4 . Stage

Chilling and storing the mustard: Transfer the mustard to a glass jar or plastic container and cover and refrigerate for 24 hours. The mustard is quite bitter immediately after blending and needs time for the bitterness to diminish. It will keep for up to 6 months in the refrigerator.