Distilled into spirits?
I’ve seen references to mustard flavored liqueur(spelling?) and many mustard condiments have wine in them, but has mustard, seeds, or greens, or even the whole plant ever been fermented and distilled to make liquor.
I can’t find any sort of references to this but maybe someone who’s information bubble doesn’t match mine might?
Yah, weird thought, I know.
So yes.
From the Wikipedia article on mustard seed:
Mustard seeds are a rich source of oil and protein. The seed has oil as high as 46-48%, and whole seed meal has 43.6% protein.
That leaves little room for sugars or carbohydrates, so there would be little fermentation, I reckon. No fermentation → no alcohol → no use distilling.
I believe those are liqueurs flavoured with mustard, but not distilled from fermented mustard. The fact that the stuff has a sugar content of 120 g/l (your first link) confirms that in my view.
Fair enough, sorry about that.
Yeah, those I’d heard of, I was wondering if mustard had ever been turned into hard liquor.
It seems that mustard seed isn’t a good candidate for this, from what @Pardel-Lux posted, but what about the greens?
Rye with mustard perhaps? 
Jack Daniels Old #7 and 5/8?
I dunno, it was just a weird thought inspired but watching a video about making booze from oreo cookies
It’s funny, I’ve heard of ketchup being used to make prison wine (certainly with all that sugar content), but mustard would’ve been a new one.
I’m sure it is possible. For someone dedicated, desperate or thirsty, you could make hooch from just about anything. Whether or not it would be any good is another question.
Not anything. You need something with sugar or convertible to sugar. Even stuff like dandelion wine is not made with just dandelions. You add a ton of sugar to it for fermentables. Ketchup has plenty of sugar. Maybe if you tried a sweet honey mustard or something?