Grind and sieve
Particle size of 250 to 400 µm. Finer speeds up hydrolysis but gives a gummy paste that is hard to de-aerate. Separate the hull if you want a smooth product: it brings mucilage but also bitterness and visible specks.
Sauces
Industrial mustard: myrosinase, pungency and stability control
Mustard is not a blend: it is an enzymatic reaction you let run and then stop. Almost every failed batch comes down to two mistakes made in the first ten minutes: water too hot, which denatures the myrosinase and leaves a bitter product with no pungency, or vinegar added before the rest, which shuts the enzyme down before it has generated any isothiocyanates. What is not formed in that window cannot be recovered later with spices.
Formulation per 100 kg of finished product
| Component | Amount | Why it is there |
|---|---|---|
| Defatted yellow mustard grits | Major component | Gives body, mucilage and the sinalbin behind the lingering tongue pungency. Short, the sauce comes out watery and weeps; overdosed, a gritty texture and bran bitterness appear. |
| Defatted brown mustard | Optional, it defines the style | Supplies sinigrin, which gives the immediate nasal hit. It defines the Dijon style. In excess the pungency is aggressive in the plant but fades fast on the shelf: that compound is volatile and passes through packaging with no barrier. |
| Conditioning water | The largest fraction of the mass. Lukewarm, never hot | No free water, no hydrolysis. Temperature is the critical parameter: above 50 °C the enzyme is inactivated and unhydrolysed precursor is left behind, perceived as pure bitterness. |
| Spirit vinegar, 10 % acidity | The dose that secures the target pH | Stops the enzyme and locks in the pungency achieved. It is also the main antimicrobial barrier. Short, the target pH is not secured; overdosed, the acid dominates and masks the pungency. |
| Salt | Low dose | Flavour, lower water activity and stronger preservation. Short, the profile is flat and hull bitterness becomes obvious. |
| Sugar | Optional, depending on the market | Balances the acidity and tempers the pungency. In the American style it goes up; overdosed, character is lost and browning increases in warm storage. |
| Turmeric powder | Trace | Yellow colour. It is photolabile: product exposed to light loses colour. In excess it brings an earthy note and stains the cap. |
| Xanthan gum | Trace. The margin between stable and slimy is narrow | Controls syneresis and holds the solids up. Overdosed, the product turns slimy and hopper dosing fails. |
| Preservative (sorbate and/or benzoate) | Only if the system demands it | Back-up against osmotolerant yeasts when pH runs high or the pack is not airtight. The legal limit is to be verified in the standard in force in the country of sale. |
Process
Step by step, with the temperatures.
Hydrate and activate
Disperse in water at 18 – 25 °C under low agitation, without drawing in air. Natural pH sits at 5.5 – 6.5, which is where the enzyme works. No point in the tank should go above 45 °C: agitator friction and summer water are the two heat sources nobody measures.
Rest and build the pungency
30 to 120 minutes at 18 – 25 °C. Time decides the intensity: short rests give low pungency; beyond 3 h volatile compound starts to be lost and sulphurous notes appear. This is the step that defines the product and the one almost nobody records.
Acidify
Add the vinegar only once the rest is over. The pH drop inactivates the enzyme and freezes the profile built. If the vinegar goes in at hydration, the pungency never forms and there is no correcting it afterwards. Dose in a stream, not all at once, so the mucilage does not flocculate.
Add the dry ingredients
Dry-blend the xanthan with sugar and salt: dispersed on its own in an acid medium it forms lumps that never break down again. Turmeric and spices last, to limit their exposure to shear and heat.
Refine
Colloid mill down to 150 – 300 µm. Refining sets the mouthfeel and slows sedimentation. Shear heats: if the product goes past 45 – 50 °C pungency is stripped out, so cool the jacket or work in two passes.
Mature
24 to 72 h at 15 – 20 °C before filling. The grits keep hydrating and viscosity rises. Product filled right after refining can double its Bostwick reading at 48 h and block the customer line.
Fill cold
At 20 – 25 °C. Mustard is not pasteurised: pH, acidity and the isothiocyanates themselves give the stability, and heat destroys the pungency that was so hard to build. De-aerate and leave minimum headspace: every volume of air in the pack is pungency lost.
| Control point | Value |
|---|---|
| pH of the finished product | 3.2 – 3.6 |
| Titratable acidity as acetic | 1.3 – 1.9 % w/w |
| Total solids | 22 – 28 % |
| Sodium chloride | 1.5 – 3.0 % |
| Hydration water temperature | 18 – 25 °C, never above 45 °C |
| Rest before acidifying | 30 – 120 min, recorded per batch |
| Bostwick consistency at 20 °C, at 48 h | 4 – 9 cm / 30 s |
| Final particle size | 150 – 300 µm |
Troubleshooting
What went wrong, and why.
Half the craft is reading the defect. These are the ones that keep coming back.
| What you see | What caused it |
|---|---|
| Pungent leaving the plant, bland after three months | The compound behind the nasal pungency is volatile: it migrates to the headspace and passes through monolayer packaging with no barrier. Pack the same batch in glass and in the commercial pack and compare at 45 and 90 days to separate a packaging problem from a formulation one. |
| Bitter and harsh, but no pungency | Enzyme inactivated by hot water or by vinegar added too early: the precursor is left unhydrolysed and is intensely bitter. Repeat a pilot batch at 20 °C with a 60 min rest; if the pilot is pungent, the problem is in the process. |
| Water separates out in the jar | Syneresis from insufficient hydrocolloid, under-hydrated grits or coarse milling. Centrifuge 10 min at 3,000 rpm and measure the serum released; if viscosity keeps rising and it still separates, it is particle size. |
| So thick it will not dose | It was filled before the grits had finished absorbing water. Measure Bostwick at 24, 48 and 72 h: if the curve does not flatten before filling, it needs more maturation or more water in the formula. |
| Pale or greenish grey colour | Turmeric degraded by light, or iron pick-up from worn equipment forming dark complexes. Compare the colour of a sample held in light against one held in the dark, and check mill and pump surfaces. |
| Dark, dry surface layer | Oxidation at the interface from excess headspace or a poor seal. Measure residual oxygen and verify closure torque and seal integrity. |
Frequently asked
What people ask before they start.
Can I pasteurise mustard to extend its shelf life?
You can, but it destroys the pungency: isothiocyanates volatilise and degrade with heat, and the product comes out flat and darker. A properly acidified mustard needs no heat treatment; its stability comes from pH, salt and the antimicrobial activity of the isothiocyanates themselves. If heat is imposed as a food safety decision, you have to accept that the result is a different sensory category.
Why not add the vinegar from the start and save a step?
Because myrosinase works in a near-neutral medium and is inactivated in acid. If the vinegar goes in before the rest, the enzyme never hydrolyses the precursors and the product ends up bitter, with no pungency and no possible correction. Vinegar is not a blending ingredient: it is the switch that shuts the reaction off once it has reached the point you want.
Can I make a very pungent mustard with yellow seed alone?
You can raise the intensity, but it is a different pungency. Yellow gives a slow, lingering tongue pungency; the immediate nasal hit only comes from brown or black seed. Yellow alone gives a product that is intense in the mouth but without that impact. The alternative is to lengthen the rest and raise the grits, accepting more body and more background bitterness.
Does it need a preservative?
With pH and acidity in range, hygienic filling and an airtight pack, the system holds without added preservative. It is justified when the pH sits at the high end, when there are low-acid ingredients in the formula or when the pack is opened and used repeatedly. The real risk in mustard is osmotolerant yeasts, not bacteria. The applicable limit is to be verified in the standard of the country of sale.
How do I standardise the pungency when the seed varies?
With three controls: analyse every lot of seed, use the rest time as the adjustment variable — the more precursor, the shorter the rest — and validate with a trained panel at 48 h against a frozen reference. You correct by blending proportions of yellow and brown, never by adding heat from another family: the time profile is different and it shows.
Sauces and dressings
Sauces
Tomato sauce
Industrial process for tomato sauce and ketchup: concentration in degrees Brix, critical pH, hot filling and Bostwick viscosity control.
SaucesIndustrial mayonnaise
Formulation and process for industrial mayonnaise: oil ratio, emulsifier, the critical pH of 4.
Acidified saucesHot sauce
Fermented or acidified, equilibrium pH at 7 days, hot filling, heat standardisation and phase separation.
RenderingBlood meal
Coagulation, separation and low-residence drying.
Contact
Ask us from wherever you are
We answer in English, Spanish, Portuguese, French, Italian and Arabic. If your question is technical and specific, so is the answer.