Home / Sichuan Kitchen / Hot and Sour Sweet Potato Noodles (Suan La Fen)

Hot and Sour Sweet Potato Noodles (Suan La Fen)

Chewy sweet potato noodles in a puckering, fiery broth with peanuts, scallions, and a drift of crushed peppercorns.

⏱ 15 minPrep time
🔥 15 minCook time
🍽 4Servings
🏷 Sichuan KitchenCategory
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Suan la fen is the late-night noodle of Chongqing, sold from steaming carts long after the rest of the city has gone quiet. The noodles are made from sweet potato starch, which gives them a remarkable chew and a faintly translucent glow, and they are sold dried in Asian markets, sometimes labeled as glass noodles. It is the dish you crave after a long day, and it delivers on every level.

Chewy glass noodles in a hot and sour broth

The broth is hot and sour in equal measure, with chili oil, black vinegar, and crushed Sichuan peppercorns, plus preserved greens and crushed peanuts for salt and crunch. It is the kind of bowl that clears your sinuses, warms your hands, and finishes too quickly. The crushed peanuts are not optional garnish, they are part of the bowl’s soul, so keep the vinegar handy at the table, since the sour is meant to be adjusted to taste.

Craving more? Explore all Sichuan Kitchen recipes.

Want the full story on the sauces behind this dish? See our Beginner’s Guide to Asian Sauces & Seasonings.

Step by stepInstructions

  1. Soak the sweet potato noodles in warm water for 10 minutes, then drain.
  2. Bring the stock to a simmer and add the noodles. Cook for 4 to 5 minutes, until chewy and translucent.
  3. Stir in the soy sauce, chili oil, garlic water, sugar, white pepper, and half the vinegar.
  4. Taste and add more vinegar if you want it more sour.
  5. Ladle into bowls and top with the preserved greens, peanuts, scallions, peppercorn powder, and a drizzle of sesame oil.
  6. Serve steaming hot.

💡 Chef tips & storage

Do not overcook sweet potato noodles; they should be chewy, not mushy, so taste one at the first sign of translucency. Adjust the vinegar at the end, the sour should be bright but not puckering.

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Recipe details

Prep15 min
Cook15 min
Servings4
CategorySichuan Kitchen
PublishedAugust 17, 2026
Emily — the cook behind My Comfort Recipes

Hi, I'm Emily 🧡

Hi, I'm Emily — the cook behind My Comfort Recipes. Simple, tested comfort food for real weeknights, written down the way grandma would. Pull up a chair. More about me →