Name: Khanom Jeen Nam Ya (ขนมจีนน้ำยา) — Thai Fish Curry Noodles
Prep time: 40 min
Cook time: 30 min
Total time: 1 h 10 min
Yield: 6 servings
Cuisine: Thai
Ingredients: 2 dried bird's eye chillies + 5 dried spur chillies (พริกแห้ง); 1 tsp galangal, 1 tbsp lemongrass, 0.5 tsp kaffir zest (ข่า, ตะไคร้, ผิวมะกรูด); 1 coriander root, 3 tbsp garlic, 2 tbsp shallots (รากผักชี, กระเทียม, หอมแดง); 0.5 tsp peppercorns, 70 g fingerroot, 1 tsp shrimp paste (พริกไทย, กระชาย, กะปิ); 100 g cooked snakehead fish (เนื้อปลาช่อน); 1 cup coconut cream + 2 cups coconut milk (หัวกะทิ, หางกะทิ); 2.5 tbsp fish sauce (น้ำปลา); 2 tsp palm sugar (น้ำตาลปี๊บ); 600 g rice vermicelli (ขนมจีน); bean sprouts, cabbage, long beans to serve (ผักสด)

The Noodle That Carries A Curry

ขนมจีนน้ำยา is the dish where everything is made twice — once by boiling, once by pounding. The fish is cooked, picked off the bone, and pounded together with a curry paste of dried chillies, galangal, lemongrass, fingerroot, shallots and garlic; then the lot goes back into the pot to become the sauce. Ajinomoto's recipe says it outright: the fish sauce (น้ำยาปลาช่อน) is the heart of the dish.

The Thai sources split the dish into two schools, and both are canonical. น้ำยากะทิ — the coconut version of the central plains — simmers the pounded fish in coconut cream and milk into a soft, rich curry. น้ำยาป่า — the jungle version — uses water and fermented fish sauce (ปลาร้า), no coconut, brighter and wilder. Kapook's jungle recipe is the blunt version: mackerel, aromatics, fish balls, and the author's own confession — she skips the pla ra because she doesn't like the smell, and the recipe still works.

Then come the garnishes, which is half the meal. Every source serves it over cold rice vermicelli (ขนมจีน) with raw vegetables — bean sprouts, cabbage, long beans — and Wongnai's recipe leaves the coconut itself "ตามชอบ" (to taste), quietly admitting the two schools blur at the family table.

The Recipe (น้ำยากะทิ, 6 servings, from Ajinomoto)

Thai	English	Amount
Curry paste (โขลกรวมกัน)
พริกขี้หนูแห้ง / พริกชี้ฟ้าแห้ง	Dried bird's eye / dried spur chillies	2 / 5
ข่า / ตะไคร้ / ผิวมะกรูด	Galangal / lemongrass / kaffir zest	1 tsp / 1 tbsp / ½ tsp
รากผักชี / กระเทียม / หอมแดง	Coriander root / garlic / shallots	1 / 3 tbsp / 2 tbsp
พริกไทยเม็ด / กระชาย / กะปิ	Peppercorns / fingerroot / shrimp paste	½ tsp / 70 g / 1 tsp
น้ำยา (the sauce)
เนื้อปลาช่อนต้มสุก	Cooked snakehead fish	100 g
หัวกะทิ / หางกะทิ	Coconut cream / coconut milk	1 cup / 2 cups
น้ำปลา / น้ำตาลปี๊บ	Fish sauce / palm sugar	2½ tbsp / 2 tsp
To serve
ขนมจีน	Rice vermicelli	600 g
ถั่วงอก / กะหล่ำปลี / ถั่วฝักยาว	Bean sprouts / cabbage / long beans	100 g / 125 g / 50 g

The jungle school (Pim's Kitchen, measured): 23 g large + 10 g small dried chillies, 70 g shallots, 50 g garlic, 50 g lemongrass, 10 g galangal, 1 tbsp shrimp paste, 300 g fingerroot, 700 g white fish, 600 g chicken feet for the stock, ⅓ cup fish sauce, ⅔ cup pla ra, 250 g fish balls. No coconut.

The Method

The paste. Pound the chillies, galangal, lemongrass, kaffir zest, coriander root, garlic, shallots, peppercorns and fingerroot until smooth — the shrimp paste goes in last.
The fish. Boil the fish, pick the meat, and pound or blend it into the paste until the mixture holds together.
The simmer. Fish-paste mixture into the coconut cream and milk; simmer gently until the sauce thickens.
The season. Fish sauce and palm sugar; taste and adjust — the sauce should be salty-sweet with a deep fish-chilli warmth.
The table. Rice vermicelli in each bowl, sauce over, raw vegetables alongside — bean sprouts, cabbage, long beans, and whatever else the family adds.

Where Thai Sources Disagree

Coconut or not. The defining split: Ajinomoto simmers in 3 cups of coconut cream and milk; Kapook's jungle school and Pim's jungle recipe use none — water and pla ra instead. Both are nam ya; they just come from different tables.

Pla ra. Kapook and Pim season with fermented fish sauce (optional in Kapook's; the author skips it). Ajinomoto and Wongnai leave it out entirely. It's the taste of the jungle school and the line many home cooks won't cross.

Which fish. Snakehead (Ajinomoto, Wongnai — the classic), mackerel (Kapook), or any white fish — Pim names snakehead, tilapia or ปลาน้ำดอกไม้ and calls them interchangeable. The paste, not the species, carries the dish.

Chicken feet. Pim's stock uses 600 g of chicken feet for body — a trick none of the others use. The collagen thickens the sauce without coconut, which is exactly the jungle school's problem solved.

Pound first or boil first. Wongnai boils the fish AND all the aromatics together, then pounds everything at once — the simplest route. Ajinomoto and Pim pound the raw aromatics into a paste first, then cook. Same end, different order.

How Western Versions Get It Wrong

Laksa confusion. It's not laksa — no turmeric-tinted coconut broth with fish balls and egg. The sauce is pounded fish, thicker, chunkier, redder.
No pounded fish. The fish pounded into the paste is the definition of the dish. A coconut-chilli sauce with fish on top is something else.
Overlooked vegetables. The raw vegetable side is half the meal, not garnish — bean sprouts, cabbage and long beans are in every source.
Cooked vermicelli. Khanom jeen is served cold or room temperature, sauce hot over the top. Boiling the noodles into the curry ruins the contrast.
One "authentic" version. The two schools are both real. A western recipe that claims the single true nam ya hasn't read the Thai sources.

UK Ingredient Notes

Fish: no snakehead in the UK — Pim's own advice: any firm white fish (tilapia, sea bass).
Khanom jeen: dried Thai rice vermicelli, the thin fermented kind — Thai grocers. Not the same as Vietnamese bun.
Fingerroot and kaffir limes: fresh at Thai grocers.
Pla ra (ปลาร้า): bottled fermented fish sauce at Thai grocers — it's the jungle school's signature; skip it if you're making the coconut version.
Chicken feet: sold frozen at Chinese grocers if you want Pim's stock trick.

Sources

This recipe is translated from the following Thai-language sources. Where they disagree, we've said so.

1. Ajinomoto (Thailand) — "ขนมจีนน้ำยาปลาช่อน" (the coconut-school recipe used here) — recipe.ajinomoto.co.th

2. Kapook — "ขนมจีนน้ำยาป่า อร่อยแซ่บคำแรกยันเส้นสุดท้าย" (the jungle school) — cooking.kapook.com

3. Pim's Kitchen (พิม) — "ขนมจีนน้ำยากะทิ น้ำยาป่า" (both schools, measured, chicken-foot stock) — pim.in.th

4. Wongnai — "ขนมจีนน้ำยาปลาช่อน" (boil-everything-then-pound school) — wongnai.com

Johnny Tiger

Johnny researches and translates Thai recipes from Thai-language sources — chefs, restaurants and home cooks in Thailand — and publishes them with their sources cited. No westernised shortcuts, no invented steps.