Place the vinegar, crushed red pepper, and garlic into a small saucepan, bring to a boil. Turn off the heat and let steep for 15-20 minutes then strain the mixture, discard the solids. Bring back to a boil then add the mustard seeds, turn off the heat and let steep for 30 minutes.
In a small bowl combine the vinegar with the horseradish, cayenne, salt, sugar, cane syrup, and brown mustard seed. Whisk in the mustard powder. Pour into the sterilized jar, put the lid on and process in a water bath for 15 minutes. When cool, tighten the lid, and make sure the jar is sealed. Place in a cool dark place and let mature for at least 3-4 weeks before using. This step will allow the flavors to marry and mellow which will not be able to take place in the refrigerator, although the mustard will need to be refrigerated after opening.
|