Mi krop is a dish whose sound comes first when you start making it in the kitchen. Drop dry rice noodles into oil and the thin bundles puff white in an instant, crackling lightly in the pot. Coat them thinly with a thick sauce reduced from tamarind, fish sauce and sugar, and you have a sweet, sour and slightly salty Thai fried noodle dish.
In Thai it is หมี่กรอบ, also written Mi Krop or Mee Krob in English. หมี่ (mi) means noodles and กรอบ (krop) means a crisp texture. In other words, the name itself means "crispy noodles." The hard parts at home are less about special technique than about "not overdoing the sauce" and "not letting the noodles get damp." Get those right and you can serve it as a light snack-and-side Thai dish, quite different from street-stall stir-fried noodles.
Mi krop is not stir-fried noodles but fried noodles lightly coated
Mi krop is not a dish like pad thai (in Japanese) in which rehydrated rice noodles are stir-fried. Thin rice noodles are fried dry, then tossed briefly in a sweet-sour sauce reduced in a separate pan. The basic idea is to take the noodles off the heat before they absorb the sauce and soften, then fold in tofu, shrimp, bean sprouts, chives and herbs.
Among Thai dishes, it isn't one that pushes with heat; it's the type eaten for the balance of sweetness, sourness, saltiness and aroma. It goes in a different direction from a strong basil stir-fry like pad kee mao (in Japanese), with texture as the star. The first bite is light, the tamarind's sourness comes through as you chew, and the fish sauce and the toasty aroma of fried tofu linger afterward.
| Element | Role | What to keep in mind at home |
|---|---|---|
| Thin rice noodles | A light base | Fry them dry, without soaking |
| Tamarind | The core of sweet-sour | Substituting only lemon juice makes the aroma shallow |
| Fish sauce | Saltiness and fermented aroma | Too much makes the fish sauce smell come forward once it cools |
| Palm sugar | Mellow sweetness | A little dark brown sugar helps get closer |
| Bean sprouts and chives | Raw crunch | Add after the heat is off and let residual heat soften them |
Ingredients and prep
If you are gathering everything from an ordinary supermarket, build around thin rice vermicelli, peeled shrimp, firm tofu, bean sprouts and chives. If you can get to a Thai grocery store or order online, you'll want tamarind paste and fish sauce. If you lean on only lemon juice and soy sauce, it becomes a plain sweet-and-sour fried noodle and loses much of mi krop's depth.
Substitutions, and ingredients not to swap
| Authentic ingredient | Substitute | Verdict |
|---|---|---|
| Tamarind paste | 2 tsp rice vinegar, 2 tsp lemon juice and 1 tsp sugar combined | Gives sourness, but less of the depth of plums or dried fruit |
| Palm sugar | 35 g light brown sugar plus 10 g dark brown sugar | A little dark sugar brings the aroma closer |
| Thin sen mi noodles | Thin rice vermicelli | Wide pho noodles are hard to fry and tend to become a different dish |
| Si-io khao | Light soy sauce | Up to 1 tsp so the color doesn't get too dark |
| Cilantro | Mitsuba and scallions | The aroma changes, but it is easier to eat |
This uses shrimp, fish sauce and rice noodles. If serving people with shellfish, fish or rice product allergies, always check the ingredient labels. To omit the shrimp, increase the amount of fried firm tofu cut small to make up the texture.
Cooking tips on shopping
Mi krop can take shape from your neighborhood supermarket alone. But it is tamarind and fish sauce that build the outline of the flavor. With them, it has the character of a Thai dish rather than a sweet-and-sour fried noodle. A wok isn't essential, but having room to move the noodles around makes it easier to coat them thinly with sauce.
The tamarind may look like more than you'll use up, but it also goes into pad thai (in Japanese), sour curries and fish stews. Fish sauce is handy in small amounts in the marinade for gai yang (in Japanese), in stir-fries and in soups.
Instructions
Fried noodles absorb moisture quickly, so before you make the sauce, set out the plate, tongs, a rack and paper towels. Rummaging around in a hurry can mean the sauce over-reduces or the noodles break in those dozens of seconds.
Where things tend to go wrong
The most common failure in mi krop is not bad flavor but lost texture. A sweet-sour taste that's a little off is still edible, but when the noodles get damp the character of the dish changes. Watch just three things carefully: the frying, the reduction, and the amount of sauce that coats.
| Symptom | Cause | Fix |
|---|---|---|
| Noodles are oily | Oil too cool, too many noodles at once | Return the oil to 170–175°C and fry 20 g at a time |
| Noodles brown and bitter | Fried too long, oil too hot | Take out within 10 seconds of puffing |
| Everything sticky | Sauce too loose or too much of it | Reduce the sauce until it pulls a thread and coat half the noodles at a time |
| Too sweet | Too much sugar, not enough acid | Add lime at the end, or 1 tsp tamarind |
| Strong fish sauce smell | Too much fish sauce added at the end | Next time add it during reducing, and add no more than 1/2 tsp at the end |
If the sauce gets too stiff, add 2 tsp water and loosen over low heat. If it's too loose, reduce in 30-second steps without the noodles until the bubbles are large and burst slowly.
How it's eaten and menu ideas
Mi krop is easier to serve as an appetizer, snack or light dish than as a side for rice. Because it is sweet, pairing it with a spicy soup or a sour salad balances the table. For example, make tom yum goong (in Japanese) the soup and add som tam (in Japanese) and sweet, sour, spicy and toasty all sit on one table.
For a weeknight dinner, it comes together better if you don't make mi krop the main starch. Put grilled chicken or grilled fish on a separate plate and serve mi krop in a portion a little larger than a small side dish, so the heaviness of the fried noodles isn't felt. On a day when you make several Thai dishes together, put fish sauce and lime on the table so everyone can adjust sourness and saltiness.
Storage and making ahead
Eat finished mi krop the same day if possible. In the refrigerator the noodles get damp, and by the next day they have the texture of a different kind of dressed noodle dish.
To make ahead, keep the fried noodles, sauce and toppings separate. Cool the fried noodles completely, put them in an airtight container without a desiccant, and keep them at room temperature for up to 2 days. Keep the sauce in a clean container in the refrigerator and use within 3 days. It's safest to finish the shrimp and tofu within the next day, refrigerated. Combine them only just before eating.
We don't recommend reheating. If you must warm it, warm only the toppings and sauce over low heat, add the noodles last and eat right away. Microwaving makes it hard to bring back the lightness of the noodles.
FAQ
Do I soak the rice noodles in water?
No. Mi krop fries dry thin rice noodles as they are and puffs them instantly. Soaking them in water makes oil splatter and the noodles don't come out light even when fried.
Can I make it with glass noodles?
You can, but the texture and aroma change a lot. Glass noodles puff lightly, but the toasty aroma of rice noodles is weaker. Making it first with thin rice vermicelli gets you closer to mi krop.
Is it a spicy dish?
By default it is mild. Keep the chili powder to about 1/4 tsp, so sweet-sour comes ahead of heat. If you're making it as a starter to serve with spicy Thai dishes, it works without any chili at all.
Is it worth making without tamarind?
You can make it as a sweet-sour fried noodle dish, but it loses much of the character of mi krop. Tamarind adds not only sourness but a thickness like that of pickled plum, dried fruit and dark brown sugar. In this article it is treated as an ingredient worth seeking out.
Sources consulted
- Wikipedia: Mi krop
- Temple of Thai: Mee Krob recipe
- Reuters: Mee krob anyone? Thais try to revive ailing cuisine
