Fermented, Spicy Mustard: Recipe and Everything You Need to Know

Real Ingredients. New Delight. Your Favorite Snack.

A good "Brotzeit" (snack/light meal) thrives on variety, genuine craftsmanship, and small special touches that transform a simple evening meal into a true culinary experience. In addition to sourdough bread, pickles, and chutneys, fermented mustard brings an exciting new dimension of flavor: mildly spicy, aromatic, and full of depth.

Fermentation is much more than just a preservation method – it makes food more digestible, more complex in flavor, and longer lasting. Especially with mustard, this process develops a unique balance of sharpness and mild acidity that perfectly complements hearty and vegetarian "Brotzeit" ideas.

For your mustard to turn out reliably, it's not just about the ingredients, but also the right accessories. Our glass weights ensure that the mustard seeds remain safely submerged in liquid throughout the entire fermentation period. This is crucial to prevent mold formation and ensure consistent results – a small helper with a big impact.

The fermentation lids make the process even easier: they automatically release the gases produced during fermentation, without you having to check daily or open the jar. This means less effort for you, more safety, and relaxed fermentation without failed attempts.

In combination with our high-quality Mason jars, you get a complete system that is not only practical but also durable and versatile – whether for mustard, cucumbers, tomatoes, or other ferments. The clear glass optics allow you to always keep an eye on the process and observe how flavor and texture develop step by step.

This transforms fermentation from a complicated project into a relaxed routine in your kitchen. Whether you're a beginner or already have experience with ferments – with the right tools, your mustard is guaranteed to succeed, and you'll enjoy your homemade recipes for a long time.

Instructions

1. Prepare brine:

   Dissolve 10 g salt in 500 ml filtered water (2% brine).

2. Ferment:

   • Place yellow and brown mustard seeds in a sterilized jar.
   • Add chili, lime, and garlic.
   • Pour brine over everything, completely covering the mustard seeds.
   • Weigh down with a glass weight, screw on the fermentation lid.
   • Ferment for 5–7 days at room temperature (18–22 °C). Check daily for bubbles/smell.

3. Puree & season:

   • Drain the liquid (save the brine).
   • Puree mustard seeds with 2 tbsp brine, add more brine as needed for desired consistency.
   • For smooth mustard, blend longer; for coarse-grained, blend shorter. (please a bit coarser for the shoot)
   • Optional: Stir in maple syrup/honey and apple cider vinegar. Adjust taste with salt/vinegar.

4. Bottling & Maturation Time:

   • Pour into sterilized jars (Ripple 0.25) and store in the refrigerator.
   • The full, complex flavor develops after 1-2 weeks.

Serving Suggestion

Freshly fermented mustard is a real highlight for your bread course. It pairs especially well with our existing recipes:

• on crispy sourdough ciabatta

• together with sweet and sour fermented tomatoes in honey

• complemented by crunchy fermented or pickled cucumbers

With spicy fermented mustard as a base, you can create a bread course that perfectly combines aroma, acidity, and spiciness – a small, homemade moment of luxury.

Enjoy your meal!

Why fermented foods are so good for your gut:

• They promote "good" bacteria in the gut
• Support digestion and nutrient absorption
• Strengthen the gut barrier
• Have natural anti-inflammatory effects

With every jar of homemade kimchi or sauerkraut, you're doing something good for your body – and laying the foundation for more energy and balance in everyday life.

A healthy gut is key to a strong immune system and greater well-being. Did you know that around 80% of your immune system resides in your gut? Probiotic foods like fermented vegetables naturally support your gut flora – without any additives. Thanks to the close connection between the gut and the brain – the so-called gut-brain axis – your gut health also influences your mood, concentration, and stress levels. No wonder, since over 90% of the "happiness hormone" serotonin is produced in the gut.

Mold-free fermentation? Tips and golden rules you should follow

Mold almost always occurs during fermentation when vegetables or fruits are not completely covered by the brine. At the surface, oxygen comes into contact with the food – and that's exactly where mold can easily grow.

With our glass weight, you can easily avoid this: it securely holds your ferment under the liquid, fits perfectly into the Mason jar, and can be easily removed after fermentation. This way, everything stays reliably submerged in the brine, mold has no chance, and you can simply enjoy the taste.

Which salt is right for my ferments?

For ferments like mustard, you need a pure salt that contains no additives. Natural varieties like sea salt or rock salt without anti-caking agents or iodine are best, as these substances can inhibit microorganisms and disrupt the process.

The salt not only adds flavor but also protects the mustard from unwanted bacteria and creates the perfect environment for fermentation.

Our recommendation: Fine sea salt, because it distributes evenly and reliably supports fermentation.

You can find more information about the perfect amount and type of salt in our salt calculator.

If you want to make your bread course even more varied and foolproof, take a look at our e-books:

• In the Fermentation e-book, you'll learn everything about the basics, tips for getting started, and creative recipes – from crunchy pickles to unusual ferments.

• The Sourdough e-book guides you step by step through baking, shows you how to maintain your sourdough starter, and gives you inspiration for breads full of flavor and character.

Additionally, on our Blog, you'll find a constantly growing collection of recipes, instructions, and knowledge about sourdough, ferments, chutneys, and pickles. There, we answer the most common community questions and share ideas that will make your next bread course a true highlight.

With our e-books and blog, you have everything you need: practical accessories, reliable knowledge, and plenty of inspiration for more enjoyment, flavor, and genuine ingredients in everyday life.