2 tablespoons whole mustard seed, crushed with a mortar and pestle
¾teaspoon salt
¼cup water
4 teaspoons apple cider vinegar
1 teaspoon sugar
Instructions
Combine dry mustard and mustard seed, salt, and sugar in a bowl.
Whisk in wet ingredients until combined.
Pour into a container, cover, and keep refrigerated for 2 days before using. This step is important as mustard needs to mellow for a bit, and it will thicken up. Mustard will keep in the refrigerator for at least 4 months.
Feel free to add a tablespoon of horseradish, garlic powder, or tarragon to the finished product for added flavor!