Chef Takumi
Ago Dashi (あごだし, grilled flying fish stock)
Ago dashi is quiet luxury: roasted flying fish, konbu, and patient water. Steep it slowly and you get a clear stock that tastes sweet, clean, and full without heaviness.
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Japanese Hot Mustard Paste (練りからし, Neri Karashi)
Created by
Neri karashi is only mustard powder, warm water, and a short rest. The whole character of it lives in that rest, when the heat wakes up.
Sauces & Condiments
Japanese
Weeknight
Quick Meal
Comfort Food
5 min
Active Time
0 min cook•10 min total
YieldAbout 3 tablespoons
Karashi looks too simple to matter. A spoonful of mustard powder, a little water, a few minutes under cover. Then it stands beside oden or natto and suddenly the whole bowl is awake, like someone opened a window in winter.
The one detail that decides it is temperature. Use warm water, not boiling water and not cold. Warm water wakes the mustard's own enzyme so the sharpness develops, while boiling water dulls it before it has begun. Stir until smooth, cover it, and wait. This is not ceremony. It's chemistry behaving politely.
We use karashi as a pointed companion, not a sauce to bury things under. A pea-sized dab beside a simmered daikon, a streak in karashi-sumiso, a little mixed into natto if that's your morning bargain with the world. Make only what you need, because its bite fades quickly. Honmono, in this case, is wonderfully severe: powder, water, patience, nothing hidden.
Karashi refers to Japanese mustard made from the seeds of Brassica juncea, the same broad mustard family long cultivated across East Asia. Prepared mustard pastes became common household condiments in modern Japan, sold in tubes for convenience, but the older method of mixing dry mustard powder with water remains the sharper and cleaner version. Unlike many Western yellow mustards, neri karashi traditionally contains no turmeric and no vinegar, which is why its color is deeper and its heat is more direct.
The technique, the tradition, and the story behind every dish.
Discover Culinary ExplorerIngredients
Japanese karashi mustard powder
Quantity
3 tablespoons
warm water
Quantity
2 tablespoons
about 40 C to 50 C
sea salt (optional)
Quantity
small pinch
| Ingredient | Quantity |
|---|---|
| Japanese karashi mustard powder | 3 tablespoons |
| warm waterabout 40 C to 50 C | 2 tablespoons |
| sea salt (optional) | small pinch |
Equipment Needed
- •Small ceramic bowl
- •Small spoon or bamboo spatula
- •Lid, saucer, or plastic wrap to cover the bowl
Instructions
- 1
Measure the powder
Put the karashi powder in a small bowl. Break up any lumps with the back of a spoon so the water can reach the powder evenly. Dry pockets stay harsh and chalky, which is not the clean heat you want.
- 2
Add warm water
Add the warm water a little at a time, stirring until the paste is smooth and glossy. Aim for the thickness of soft miso, stiff enough to hold a small mound. Warm water wakes the mustard's heat; boiling water weakens it, and cold water makes it slow and uneven.
If it turns too loose, add a small pinch more powder. If it is crumbly, add water by the drop. Karashi should sit on a plate, not run across it. - 3
Cover and rest
Gather the paste into a neat mound, cover the bowl tightly, and let it rest for five to eight minutes. Some cooks turn the covered bowl upside down, which traps the aroma and keeps the surface from drying. The rest is when the sharpness blooms, so don't rush the part that makes it karashi.
- 4
Stir and serve
Stir once more, then serve in a small condiment dish. Use it in small dabs beside oden, natto, tonkatsu, or mixed with miso, vinegar, and sugar for karashi-sumiso. Make only what you'll use soon, because the bright bite fades as it sits.
Chef Tips
- •Buy karashi powder rather than Western yellow mustard powder if you can. Karashi has no turmeric and usually no added seasoning, so the heat is cleaner and the color more restrained.
- •Don't use boiling water. It feels efficient, which is how many small kitchen mistakes disguise themselves. Warm water gives the mustard time to develop its sharpness.
- •Mix karashi just before serving. After an hour it still tastes like mustard, but the keen edge has gone. For oden, that edge is the whole reason it is there.
- •Tube karashi is a sensible stand-in for a busy night, not the same thing. It is convenient and softer. Powder mixed fresh is brighter, sharper, and closer to the old table.
Advance Preparation
- •Neri karashi is best made five to ten minutes before serving, after the rest has bloomed the heat.
- •If you must hold it, keep it covered at room temperature for up to one hour. Refrigeration slows the fading but also firms the paste, so stir it before serving.
Frequently Asked Questions
Nutrition Information
1 serving (about 16g)
Calories
30 calories
Total Fat
2 g
Saturated Fat
0 g
Trans Fat
0 g
Unsaturated Fat
1 g
Cholesterol
0 mg
Sodium
25 mg
Total Carbohydrates
3 g
Dietary Fiber
1 g
Sugars
0 g
Protein
2 g
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