Mustard is one of those products that almost everyone routinely keeps in the fridge. But did you know you can very easily make mustard yourself with mustard seed? With just a few ingredients you create a coarse, characterful mustard that has much more depth than most supermarket varieties.

You also decide how spicy, acidic or sweet your mustard becomes. Ideal for those who like to cook with pure flavors — without unnecessary additives.

What do you need to make mustard yourself?

Basic recipe for coarse mustard:

• 50 g yellow mustard seed

• 25 g brown mustard seed (for extra kick)

• 80 ml plain vinegar or apple cider vinegar

• 60 ml water

• ½ tsp salt

• Optional: 1 tsp honey or maple syrup

Why two types of mustard seed?

Yellow mustard seed is milder and slightly nutty. Brown mustard seed is spicier and more aromatic. The combination gives balance and depth, but of course you can also use only yellow mustard seed.

Step-by-step: how to make your own mustard

Step 1 – Soaking

Mix the mustard seed with vinegar and water. Let this soak for at least 12 hours (preferably 24 hours) in a closed jar. This activates the enzymes that create the typical mustard heat.

Step 2 – Blending

Pour the mixture (including the liquid) into a blender or use an immersion blender. Blend to the desired texture: coarse for a rustic mustard, longer for a smoother variant.

Step 3 – Seasoning

Add salt and optionally honey for a subtle sweetness. Taste and adjust.

Step 4 – Letting mature

Spoon the mustard into a clean glass jar and let it mature in the fridge for at least 2 days. The flavor becomes milder and rounder.

How to make mustard spicier or milder?

The sharpness of mustard arises from a reaction between mustard seed and moisture.

Want it spicier?

• Use more brown mustard seed

• Add less vinegar

• Use cold water

Want it milder?

• Use warm water

• Add a little more vinegar

• Let it mature longer

3 Variations on homemade mustard

1. Honey mustard

Add 1–2 teaspoons honey after blending. Perfect for dressings or chicken dishes.

2. Beer mustard

Replace the water with blonde beer. Gives a slightly bitter, complex flavor - ideal with cheese or sausage.

3. Coarse French style

Blend briefly so that the seeds remain mostly whole. This variant is lovely in vinaigrettes or with roasted vegetables.

How to use homemade mustard?

Homemade mustard is surprisingly versatile:

• In salad dressings

• In marinades for chicken or salmon

• In potato salad

• On a snack board

• As a flavor base in sauces

Tip: Stir a teaspoon into yogurt or quark for a fresh, light sauce without many calories.

How long does homemade mustard keep?

In a well-sealed, sterile jar mustard lasts about 3 to 4 weeks in the fridge. Because of the acidity it is relatively long-lasting.

5 Frequently asked questions about making mustard yourself

1. Can I use only yellow mustard seed?

Yes, but the flavor will be milder. For more kick combine yellow and brown.

2. Why does my mustard taste bitter?

That can be caused by blending too long or too vigorously. Let the mustard mature for a few days; the bitterness often decreases.

3. Do I have to roast the mustard seed first?

No, for mustard the seed is not roasted. Roasting changes the flavor and reduces the typical sharpness.

4. Can I make mustard without vinegar?

You can, but vinegar provides shelf life and balance. Lemon juice is an alternative.

5. Is homemade mustard healthier?

You control the ingredients. No unnecessary sugars or additives, so often purer than many ready-made varieties.