Vienna, 18 July 2020

A week or so ago, I accompanied my wife to an upscale (i.e., swanky) supermarket in the central district of Vienna to buy bresaola (an Italian delicacy which I have covered in an earlier post). As she waited to be served, I wandered around looking idly at what was on offer in the condiments section, where I was much struck by this array of mustards.

my photo

Mustards of all types, from all corners of the world, were on display. So many, so inviting! (I have touched upon the delights of mustard in at least one previous post). I had to investigate this wonderful condiment, I decided. Now, after many hours of surfing the internet’s electronic waves, I am ready to report back.

We have to begin, of course, at the beginning, that is to say with the plant which produces the mustard seeds. Actually, it’s three plants: Brassica nigraBrassica juncea, and Sinapis alba, and they produce black, brown, and white mustard seeds, respectively. The first two are closely related, the third is a distant cousin of the other two. This is what the plants look like (from left to right Brassica nigraBrassica juncea, Sinapis alba)

various sources

Those readers who see a distinct resemblance to the rapeseed plant will be right. Rapeseed is a close relative to the black and brown mustard plant. A rarity until the 1970s, it is now grown in huge quantities around the world, giving rise to field after monotonous field of the stuff


as well as to the questionable delights of colza and canola oil (why this sudden rise to fame of the rapeseed is a story for another day).

(A quick parenthesis: the Brassica family, to which black and brown mustard as well as rapeseed belong, seems to have a hugely elastic genome; farmers have managed to coax all sorts of different yummy foodstuffs from members of this family, as I have related in a previous post. The precise genomic relationships between the various members of the family were first described in the delightfully-named Theory of U, so called because it was published in 1935 by the Korean botanist Woo Jang-choon, writing under the Japanized name Nagaharu U – readers will recall that Korea was a Japanese colony in 1935).

Anyway, back to mustard. For readers – like me – who have never actually seen mustard seeds in the flesh (as it were), I throw in a mug shot of all three together. From left to right, we have black, brown, and white mustard seeds; I think the photo explains the colour-coded names they have been given.

Sources: various Amazon sites

The seeds are tiny, by the way, 1 mm or so in diameter. Readers with a Christian background will no doubt recall the parable in the synoptic Gospels (I quote here the version from Matthew): “The Kingdom of Heaven is like a grain of mustard seed, which a man took, and sowed in his field; which indeed is smaller than all seeds. But when it is grown, it is greater than the herbs, and becomes a tree, so that the birds of the air come and lodge in its branches.” Most people believe the parable refers to the black mustard plant, which can grow up to 3 m tall.

The seeds not only differ in colour, they also differ in “punch”, that sharp, hot, pungent flavour which we associate with mustard, with white mustard seeds being milder than the other two. Here I have to explain a little where that punch comes from, because it is important to our story of mustard condiment. The seed itself has punch, so if you ate a seed or two you would feel a bite in your mouth. But much of the punch that we associate with mustard actually comes from a series of chemicals which are produced when an enzyme naturally present in the seeds reacts with other chemicals also naturally present in the seeds. These reactions only occur when the enzyme is activated by the presence of water. Thus, the real kick from mustard only comes if you break up the seeds and mix them with water or with a liquid containing water. The enzyme can be denatured, thus making the mustard’s kick milder, by applying heat (using hot water or heating the mixture) or by using acid – the more concentrated the acid, the more denatured the enzyme.

Interestingly enough, of all our ancestors only the Romans stumbled onto this trick for getting mustard to pack a more powerful punch – or at least they were the only ones who used the trick routinely. Others – the Indians and the Ethiopians, for instance – used mustard seeds as a spice and so relied mainly on the seeds’ “dry” punch, while others still – the East Asians in particular – used mustard plants as a leaf vegetable and ignored the seeds.

The name “mustard” gives us a possible clue to what liquid the Romans used to make their mustard condiment. “Mustard” derives from the old French word “moustarde” (which has become the modern French “moutarde”), which in turn comes from the Latin “mustum ardens”, or “fiery must”. Must is the fresh juice that is squeezed out of grapes in the wine presses. Here we have a Roman mosaic showing men merrily (and probably somewhat tipsily) stomping on the grapes to expel the must, which is flowing into receptacles below.


The ground mustard seeds presumably added piquancy to the must. I find this quite intriguing, because as far as I know no-one makes mustard in this way anymore. It just so happens that come Autumn, when the grape harvest is in, must is a popular drink to quaff in the wine taverns which dot the outskirts of Vienna and the woods surrounding it.


I must make a mental note to try making my own Roman-style mustard this Autumn, to see what it tastes like. Since must is quite sweet, I would imagine that I would end up with a sweet mustard.

On the other hand, the two recipes for making mustard which are to be found in surviving Roman cookbooks actually use vinegar as the liquid. I quote here (in translation) the shorter of these recipes, from Palladius’s book on agriculture, Opus agriculturae, written some time in the late 4th, early 5th Century AD.

“Grind one sextarium [2 quarts] of mustard seeds with five pounds of honey and one of Hispanic oil, diluting with one sextarium [2 quarts] of strong vinegar. Grind everything together diligently and use.”

The honey suggests to me that this mustard would also be sweet. Perhaps the Romans liked their mustard sweet.

So what “accelerant” (to use a term from fire-making) did the Romans use to fire up their ground mustard seeds? Must? Vinegar? Perhaps they used either one or the other, depending on the tastes of the cook. Perhaps they used both; a popular Roman drink was must clarified with vinegar. Perhaps they used other liquids, now lost to us in the mists of time. We shall probably never know.

What is important for the history of mustard is that the Romans took both vines and winemaking, and probably their mustard seeds as well, north into Gaul after they had conquered it, and the making of both wine and mustard took hold there. There was a certain desire – at least among the Gaulish elites – to emulate their Roman conquerors, as Goscinny and Uderzo brilliantly showed us in their Asterix album Le Combat des Chefs.


Luckily for us, the Gauls, who were soon to become the French, continued with their love of mustard long after the Romans had departed and their Empire had collapsed. The symbiotic relationship between wine and mustard seed continued. Must as the accelerant seems to have been forgotten and vinegar took its place; mustard making was a good way of using wine that had soured and turned to vinegar.

While many of the emerging wine regions of France also became mustard making regions, the prince among them all was Burgundy, with its capital Dijon. For want of a photo of Dijon mustard from the 14th Century, I thrown in a photo of the delightfully coloured roofs of Dijon’s cathedral instead.


Dijon mustard seems to have become the gold standard for mustard makers, with everyone else around Europe trying to emulate them. But what did you do if you lived in a part of Europe to the north of where vines would grow? The following map shows roughly where the current northernmost boundary of vine growing is. I don’t think it’s changed much over the centuries, although it is now creeping northwards because of climate change (but that is a discussion for another day).

my map

What did you use instead of wine vinegar?

Well, of course these northern regions all had fruit or grain, and you can ferment either to make alcohol, and you can ferment alcohol to make vinegar. As an example, let me use the English mustard from Tewkesbury (which, for those readers who are somewhat hazy about English geography is a quiet market town in the county of Gloucestershire). I choose this particular mustard for a number of reasons, as will become clear in a minute.

I haven’t talked at all about all the other herbs, spices, and other goodies which mustard makers have added over the centuries, and continue to add, to their mustards, to amend the taste. As readers can imagine, though, they all have their secret list of additional ingredients. Tewksebury mustard is interesting in that its makers added large amounts of horseradish (and for this reason it got a mention in an earlier post about this potent root). This seems to me to be an example of creating a double-whammy, because the chemicals created by that enzyme in mustard are very similar to the chemicals in horseradish. From which I deduce that Tewkesbury mustard must be pretty damned strong. So that’s one reason for my choosing to talk about Tewkesbury mustard.

To make Tewkesbury mustard, its citizens would steep grated horseradish in vinegar made from apple cider for some two days and then mix this infusion with powdered mustard seed (ground, I am delighted to report, by using an iron cannonball as the pestle in a mortar). So here we have an example of a non-wine vinegar being used as the accelerant. Other vinegars have been used by other mustard makers.

Tewkesbury mustard was famous all over England. Why, it was famous enough to get mentioned by the Bard of Avon himself! The citation comes from Shakespeare’s Henry IV, part II, where at some point Falstaff says of his companion Ned Poins, “He a good wit? Hang him, baboon. His wit’s as thick as Tewksbury mustard. There’s no more conceit in him than is in a mallet” (for readers interested in looking the citation up, it appears somewhere in Act 2, scene 4).

To get around the tricky problem of how to transport their mustard all around the kingdom, the citizens of Tewkesbury rolled it into balls and then allowed them to dry. The dried balls could then be transported quite easily and would keep a long time. Customers would purchase a ball, cut off a slice whenever needed, and then steep it once again in any manner of liquids of their choosing: water, milk, cider, cider vinegar, wine, ale, beer, or fruit juice. Once soft enough, it would be whipped to a thick, creamy consistency (as we know from the quote from Shakespeare).

At some point, the round shape of the product, allied to its horseradish-enhanced pungency, led wits to use Tewkesbury mustard as slang to describe incendiary fire-balls. Here, for instance, we have the great philosopher David Hume, in his History of England, writing about a rumour that the Great Fire of London of 1666 was started by foreign arsonists trained by Jesuits: “Fire-balls were familiarly called among them Tewkesbury mustard pills”. That certainly tells us something about their fiery nature …

I find this idea of offering mustard in the form of balls quite delightful. Sadly, the manufacture of Tewkesbury mustard died out at the beginning of the 19th century, possibly under the pressure of having to compete with newfangled powdered mustards liked Colman’s. Luckily, however, some brave souls are trying to revive its manufacture in Tewksebury (although also wisely offering the mustard in the modern form: ready-made in jars, ready to slather on). They are also trying to brand the mustard by applying for Protected Geographic Indication status. Here is a photo of a pile of these balls.


It’s certainly the case that for some reason finely powdered mustard became the norm in England (as well as in certain British colonies like Australia). Colman’s mustard dominated the market, selling its mustard in these iconic yellow tins.


One of my first memories of mustard was a small yellow tin just like these in my English grandmother’s kitchen cupboard. She used it in her vinaigrettes and she taught little 8-year old me how to make them (I still remember the recipe: “1 teaspoon of vinegar, dissolve in a pinch of salt, a pinch of sugar, 2 pinches of Colman’s mustard powder, add 3 teaspoons of oil”). A whip around the web shows me many people of about my age fondly recalling their mothers using Colman’s mustard powder in all manner of dishes. It seems to me, though, that those mothers of yesteryear were using mustard powder more like a spice – like a curry powder – than a condiment. Interestingly enough, the first Mr. Colman, Jeremiah Colman, was not in the vinegar business as were many of the mustard makers of the time. He was a miller instead; clearly, he was only interested in the milling of the mustard seeds; what liquid was used to fire up the powder didn’t interest him (this connection between mustard and milling rather than mustard and vinegar was at the basis of at least one other well-known mustard, la moutarde de Meaux in France; Meaux was well-known since Carolingian times as a place which sat on a rock formation which made excellent grinding stones).

In 1756, some 60 years before Jeremiah Colman set up his mustard grinding business in Norwich, a revolution occurred in the heart of the mustard business, Dijon. There, a certain Jean Naigeon switched from using vinegar to using “verjus”, or verjuice in English. Verjuice is an acidic juice made from pressing unripe fruit or sour fruit of one variety or other (“verjus” translates as “green juice”). During the Middle Ages it was widely used all over Europe as an ingredient in sauces, as a condiment, or to deglaze preparations. Over time it fell out of fashion, with cooks replacing it with either wine or some variety of vinegar or lemon juice. Jean Naigeon moved in the other direction, shifting from vinegar to verjuice. Specifically, he used verjuice prepared with green, unripe grapes hailing from the Côte d’Or (home to most of the greatest Burgundy wines). For readers who are curious about what this verjuice might look like, I throw in a photo of a bottle of the stuff made by one of the few local mustard manufacturers left in the Dijon area, Edmond Fallot. It looks quite like a normal white wine; it is simply much more acidic.


From then on, mustard makers in Burgundy, as well as in many other places which were copying Burgundy’s mustards, used verjuice, possibly mixed with vinegar, possibly mixed with wine, as the accelerant in their preparations. When mustards proclaim on their labels that they are made with wine, they may have some real wine in them, but most of the “wine” will actually be verjuice.

This shift to verjuice leaves me thinking. As I said, verjuice can be made from any unripe or sour fruit. A quick whip around the web has shown me that there are makers of crab apple verjuice and apple verjuice. Perhaps other fruits have been used. Has anyone tried making mustard with other verjuices? I have not found any being marketed on the web. Is there a reason for this, I wonder? I cannot think of one. Perhaps some clever entrepreneur will give it a go (and if I find a bottle of non-grape verjuice here in Vienna, I might also give it a go, before I try making my mustard with must).

The one other big change that happened to mustards took place in Munich, in the mid-19th Century. This was the development of Bayerischer Süßer Senf, or Bavarian sweet mustard, a mustard which goes exceedingly well with the traditional Bavarian white sausage, or Weißwurst (normally eaten with a large soft pretzel, the Laugenbrezel).


This is the type of mustard we currently have on our dining table. We don’t eat it with white sausage (we wish!); my wife uses it to give taste to her rather bland diet of chicken and turkey (which I suppose has always been the purpose of mustard, ever since Roman times, to give otherwise bland food some oomph).

This mustard was developed by one Johann Conrad Develey. He was from an old Huguenot family which had escaped from France to Switzerland (hence his French-sounding name). He himself came to Munich from Switzerland via Lindau and Augsburg, where he had done his schooling. He started by making Dijon-style mustard, but he sensed that there was an unfulfilled demand for a sweet mustard. He played around with various ingredients, of which sugar was naturally one. He finally hit the jackpot when he caramelized the sugar by plunging red-hot pokers into it. The caramelization process gave his concoction a depth of taste he couldn’t get with sugar alone. Thus, it seems, that mustard development had gone back to where it started in Roman times, with a sweet mustard.

The rest of the mustard story is rather depressing. It is a story of industrialization, developing machines that could make mustard ever more quickly and in ever greater quantities (this is what made Maurice Grey, of Grey-Poupon mustard, famous), which in turn meant ever greater concentration: the micro mustard makers didn’t have sufficient capital to buy the new machines and went to the wall, allowing the remaining firms to capture more market and grow ever bigger. It is then a story of building up brands through advertizing of one form or another.


Notice the stoneware pots in this ad; this became a very popular way of branding mustards.


Amora started selling its mustard in pots which housewives could reuse as drinking glasses. Themed glasses were made, where you could collect the whole set.

It is finally a story of ever bigger companies buying up the smaller companies.


Now all that’s left are vast, faceless multinationals which have no sense of place, of “terroir” as the French call it, which are only interested in owning famous mustard brands – made famous through clever advertizing – and which will make the mustards wherever it is cheaper to make them, with ingredients it will source from the cheapest place, and will look to substitute the more expensive ingredients with others which “give more or less the same taste”. I know, I’ve been there. I once did environmental due diligence work for a multinational company whose name will not pass my lips, which was intent on buying up an Italian shoe polish company with a well-known brand. The company had been making the polish from the very start in Padova, using a local workforce. The purchase went through. The last time I passed Padova by car – you could see the factory from the motorway – the factory was gone; the polish is probably now made in China or somewhere similar.

Luckily, though, there are courageous entrepreneurs fighting back, trying to make mustards again locally, with local ingredients where possible, aiming to put on the market a product which is good and not just branded. I wish them luck. I urge all my readers to buy these non-branded mustards. I also urge them to have a go at making their own mustard rather than getting it off a supermarket shelf. There are tons of recipes online for making mustard at home. And I will try to make mustard with must this Autumn and with non-grape verjuice if I can find it. I will report back if I succeed (a big part of the success will be to persuade my wife to help).