Dashi
Ichiban dashi · Niban dashi · Kombu dashi
Dashi: what every chef needs to know
From bistro to banquet hall, Dashi earns its spot as the fundamental Japanese stock made by cold- or hot-extracting umami-rich ingredients in water. Unlike Western stock, dashi contains no fats or collagen: it is a pure umami solution. Professional types: - Ichiban dashi (first draw): kombu (40g/L) cold-steeped, then katsuobushi (30g/L) at 65°C (149°F) for 2–3 minutes. Clear, delicate, for soups and suimono - Niban dashi (second draw): the same kombu and katsuobushi re-steeped longer (15–20 min, higher temp). Fuller, slightly cloudier, for simmering and tsuyu - Kombu dashi: kombu only, 30 min cold-steep or 30 min at 60°C (140°F). Vegan, delicate - Niboshi dashi: dried sardines (niboshi), more pronounced fish flavour, for miso soup and ramen - Shiitake dashi: dried shiitake, rich umami with an earthy note, vegan Glutamate in ichiban dashi: 250–350mg/100ml, entirely from extraction of glutamate from kombu (guanylate + glutamate = synergistic umami amplification).
Dashi: nutritional values per 100g
Based on unprocessed product. Source: USDA FoodData Central (ichiban dashi, per 100ml) — the Dutch food composition database, managed by RIVM and Wageningen University.
Nutritional values are indicative for unprocessed raw materials. Preparation method, variety and origin may affect values. Source: USDA FoodData Central (ichiban dashi, per 100ml).
Dashi: classic dishes
Proven preparations from the professional kitchen — from haute cuisine to global restaurant classics. Use as inspiration for menu development and recipe costing.
Steamed Japanese egg custard made with ichiban dashi. Dashi is the flavour foundation: the purity of the broth entirely determines the quality of this dish.
Clear soup of ichiban dashi, lightly seasoned with soy sauce and salt. Served as the chef's heartbeat monitor: the dashi quality has nowhere to hide.
A gentle simmer of vegetables, eggs, tofu and fish cakes in niban dashi. Dashi is the constant backdrop from which all ingredients release and absorb flavour over the course of hours.
Dashi: preparation techniques
Exact temperatures and times for HACCP compliance. Core temperature is leading for poultry and pork.
Cold steep: kombu in cold water for 8-12 hours yields the most glutamates and the finest, most delicate flavour without bitterness. Hot method: heat kombu water to 60°C (NEVER boil — slimy, bitter polysaccharides dissolve above 80°C). Remove kombu at 60°C. Bring to 65°C, add katsuobushi, steep for 2-3 minutes and strain immediately. Never press — cloudy, bitter dashi results.
Vegan ichiban dashi: steep kombu exclusively in cold water for 8-12 hours. This yields the highest free glutamates (800-1,200mg/100g dried kombu). For added umami depth, include 2-3 dried shiitake: these provide guanylate, which works synergistically with glutamate for up to 7x more perceived umami.
Dashi has no preservative properties: the short steeping time and low temperature produce a clean but unstable product. Cool immediately after preparation (ice bath to below 10°C within 30 minutes). in professional kitchens: prepare batches in the morning, portion immediately. Freezing dashi as ice cubes is ideal for small portions of miso soup or sauces.
Dashi: HACCP storage and food safety
Based on Codex Alimentarius (WHO/FAO) and EU Regulation 852/2004. Consult your national authority (NVWA/FDA/FSANZ) for applicable local standards.
Dashi: global seasonal overview
Availability per climate zone — Northern Europe, Mediterranean and warm climate. Relevant for purchasing planning and international menus.
Dry ingredients (kombu, katsuobushi, shiitake) available year-round. Fresh dashi is prepared daily in Japanese kitchens.
Dashi: EU-14 allergen information
Full overview compliant with EU Regulation 1169/2011 (Annex II). Raw material information — always verify with your supplier for processed products and possible traces.
Raw material information (unprocessed product). Processed products may contain traces. EU Regulation 1169/2011 Annex II.
Dashi: wine pairings
Every wine recommendation is verified via at least 4 independent sources: wine specialists, sommeliers and culinary authorities. Serving temperatures conform to Wine Enthusiast and Vintec guidelines.
Daiginjo shares the delicate, umami-rich character of ichiban dashi. The fruity esters (ginjo-ka) contrast with the minerality of kombu without overpowering the fine broth.
- Niigata Daiginjo
- Kyoto Daiginjo
Wine advice is for culinary information purposes only. Wines and appellations are exemplary; availability varies by region and supplier.
Frequently asked questions about Dashi
Why should kombu not be boiled?
Kombu contains slimy polysaccharides (fucoidan, alginate) that dissolve above 80°C (176°F) and make the dashi cloudy and slimy. Bitter compounds also dissolve at high temperatures. Always keep kombu extraction temperature below 70°C (158°F). This is the biggest difference between dashi and Western stock: dashi is never boiled.
What is the difference between ichiban and niban dashi?
Ichiban (first) dashi: short extraction, clear, delicate, for soups and sauces where subtlety matters. Niban (second) dashi: the same kombu and katsuobushi re-steeped longer and hotter. Fuller, slightly cloudier, less refined. Niban is the workhorse: for tsuyu, simmering, braises and tare. Professional Japanese kitchens use both — zero waste.
Can I prepare dashi in advance and store it?
Yes, but with strict HACCP guidelines. Dashi has no preserving properties (no salt, no acid). Prepare in the morning, cool rapidly (<10°C/50°F within 30 min via ice bath), store at 0–4°C (32–39°F), use within 3 days. For longer storage: freeze in portion blocks. Instant dashi (hondashi powder) or concentrate are alternatives for longer shelf life.
How do I make vegan dashi?
Combine kombu (40g/L) cold-steeped with dried shiitake (20g/L). Kombu provides glutamate, shiitake provides guanylate: together they give synergistically up to 7x more perceived umami than either alone. Steep cold for 8–12 hours or warm at 55–60°C (131–140°F) for 30–45 minutes. Strain. No fish needed for deep umami.
At what temperature should you store Dashi?
Store Dashi at 0-4°C, max 3 days, compliant with EU Regulation 852/2004 and Codex Alimentarius guidelines.
How do you prepare Dashi professionally?
The primary professional technique for Dashi is Ichiban dashi prepare at 60-65°C for kombu, 65°C for katsuobushi for Kombu: 30-60 min cold or 30 min on 60°C. Katsuobushi: 2-3 min. Always verify core temperature with a calibrated probe thermometer.
Alternatives for Dashi
Professional substitutes for dashi in hospitality: culinary alternatives, allergen-free options and seasonal replacements. Including HACCP storage conditions per alternative.
Legal disclaimer: For informational purposes only
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Informational character
The information on this page has been compiled exclusively as reference material for professional kitchen staff. KitchenNmbrs does not provide legal, medical or commercial advice. Data on preparation techniques, storage temperatures, HACCP guidelines and allergens is based on publicly available professional sources and applies to the raw ingredient in its unmodified state.
Your responsibility as operator (FBO)
Under EU Regulation 1169/2011 (Food Information Regulation) and EU Regulation 852/2004 (HACCP Hygiene Regulation), the Food Business Operator (FBO) is solely and exclusively responsible for:
- Providing accurate, up-to-date and complete allergen information to the end consumer;
- Determining allergens in the finished product based on current supplier documentation;
- Maintaining and documenting a demonstrable HACCP management system;
- Controlling cross-contamination risks within their own production environment;
- Compliance with local food safety authority requirements.
Allergen information: Limitations
The allergen information on this page relates to the ingredient as such. The actual allergen composition of your purchase may differ due to:
- Varying suppliers, production facilities or growing regions;
- Cross-contact during production, transport or storage ("may contain");
- Changed product formulations not yet reflected in public sources;
- Processing or preparation in your own kitchen that introduces new allergens.
Always verify allergens against the current specification sheets (spec sheets) from your supplier. Orally or informally provided allergen information is not legally valid under EU Reg. 1169/2011.
Milk allergen and lactose intolerance
The EU-14 allergen "Milk (including lactose)" covers two distinct conditions, both of which require declaration: (1) cow's milk allergy, an immunological reaction to milk proteins (casein, whey), and (2) lactose intolerance, an enzymatic deficiency (lactase) preventing digestion of milk sugar. Both groups must be informed separately on the menu. Lactose-free is not the same as milk-protein-free: a guest with cow's milk allergy may still react to lactose-free products.
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Official sources and authorities
Legal basis: EU Reg. 1169/2011 Annex II (EU-14 allergens) · EU Reg. 852/2004 (HACCP) · Local food information legislation as applicable
