When summer hits in Sichuan, the humidity can be suffocating. Heavy, hot stews are replaced by Liangban (cold tossed) dishes that revive the appetite. While many people associate Chinese potato dishes with the spicy Hot and Sour Shredded Potatoes, this version—Scallion Oil Potato Strips—is the unsung hero of the dinner table.
It’s savory, incredibly aromatic from the scallion oil, and possesses a signature texture that often confuses Western palates at first: crunchy.
Yes, crunchy. In the West, potatoes are almost always cooked until soft and fluffy (think mashed or baked). In Chinese cuisine, specifically for stir-fries and salads, we treat the potato as a vegetable to be prized for its crisp texture.
This recipe is simple, using just a few ingredients, but it relies heavily on technique. If you get the blanching time right and follow my specific method for draining the water, you will have a restaurant-quality appetizer in under 15 minutes.
I grew up in a restaurant family in Sichuan, where knife skills were the first thing we learned. Shredding potatoes (Tudou Si) was the daily drill. I spent years perfecting the thickness of my shreds because uneven cuts mean uneven cooking—some bits turn to mush while others stay raw.
This specific recipe is adapted from those professional kitchen days but simplified for the home cook. I have tested this method on gas ranges and electric glass-top stoves to ensure the blanching times are accurate for everyone.
Why This Recipe Works
- Texture Control: By rinsing the starch off the potatoes and shocking them in ice water, we stop the cooking process instantly, ensuring that signature “al dente” crunch.
- Aromatic Infusion: Instead of heavy sauces, we use Scallion Oil. This coats each strand of potato in a savory, oniony fragrance without weighing it down.
- The “Lift” Technique: Most home cooks pour their drained vegetables into a bowl. I will teach you why you must lift them instead, ensuring the dressing doesn’t get watered down.
What is Scallion Oil Potato Strips?
Liangban means “cold tossed,” and Tudou Si means “potato shreds.” Unlike the creamy, mayo-based potato salads found in the US, this is light, vinegary, and salty-savory. It serves as a palate cleanser between rich bites of Braised Pork Belly.
Key Ingredients & Substitutions
- Potatoes: I recommend using Russet potatoes or generic yellow potatoes. While Russets are high in starch (which usually means fluffy), washing away the surface starch allows them to stay crisp. Avoid very waxy potatoes like red bliss, as they can sometimes feel “gummy” when blanched.
- Scallion Oil (葱油): This is the soul of the dish. You can buy bottled Scallion Oil at Asian markets, or use the oil rendered from making Scallion Oil Chicken. Substitute: If you don’t have scallion oil, fry 2 chopped scallions in 2 tablespoons of neutral oil until brown, then discard the scallions and use the oil.
- White Vinegar: Use Chinese white rice vinegar or plain distilled white vinegar. Do not use black vinegar here; it will ruin the clean color of the dish.
- MSG (味精): A tiny pinch lifts the savory flavor (umami). It is optional, but highly recommended for that authentic restaurant taste.
- Green/Red Peppers: These are mostly for color and a subtle fresh flavor. You can use bell peppers or mild chili peppers (like Anaheim) if you don’t want heat.
Ingredients
The Main Event
- 2 medium Potatoes (approx. 1 lb / 450g), peeled
- 1 long Green or Red Chili Pepper (mild or spicy, depending on preference)
- 1 clove Garlic, finely minced
The Seasoning
- 2 tbsp Scallion Oil (or aromatically infused oil)
- 1/5 tsp Salt (adjust to taste)
- 1/8 tsp MSG (optional, “a pinch”)
- 1/2 tsp White Vinegar (just a splash for brightness)
Recipe Notes Before You Start
- Knife Skills vs. Mandoline: If you are not confident in slicing potatoes into uniform matchsticks (approx. 3mm thick), please use a mandoline slicer. Uniformity is key for even cooking.
- Ice Bath: Prepare a large bowl of cold water (with ice cubes if possible) before you start boiling water. You won’t have time to do this later.
How to Make Scallion Oil Potato Strips
Step 1: Prep the Potatoes
Slice the peeled potatoes into thin shreds (julienne). Ideally, they should be the size of wooden matchsticks.
- Crucial Step: Immediately place the shredded potatoes into a bowl of cold water. Rinse them, change the water, and rinse again until the water runs clear. This removes the excess starch. If you skip this, the potatoes will become sticky and glue-like instead of crunchy.
Step 2: Prep the Aromatics
Remove the seeds and white pith (the “bitter ribs”) from your green/red peppers. Slice them into thin shreds to match the potatoes. Finely mince the garlic clove.
Step 3: Blanching (The Critical Moment)
Bring a large pot of water to a rolling boil. Add the potato shreds.
- Time: Blanch for roughly 2 to 3 minutes.
- Visual Cue: You are looking for the potatoes to turn transparent/translucent. They should lose their raw, opaque white look but still hold their shape firmly.
- Add Peppers: When the potatoes are fully translucent, toss in the shredded peppers. Let them blanch together for just 10 seconds.
Step 4: The Shock
Turn off the heat. Immediately fish the vegetables out (or drain into a colander) and plunge them directly into your prepared cold water bath. Stir them gently.
- Why? This stops the cooking process instantly. It “locks in” the crunch. If they sit in their own heat, they will turn soft and mushy.
Step 5: The “Lift” Technique (Don’t Pour!)
Once the potatoes are completely cool, you need to dry them.
- Expert Tip: Do not just pour the bowl into a colander. Reach in with your hands, grab a handful of potatoes, squeeze them gently to expel water, and place them into a dry mixing bowl.
- If you pour from the bowl, the heavy starch water at the bottom often comes with it. We want the potatoes as dry as possible so the oil dressing clings to them.
Step 6: Season and Serve
To the mixing bowl with the dried potatoes, add:
- The minced garlic
- A pinch of MSG (tip of a teaspoon)
- 1/5 tsp salt
- 2 tbsp Scallion Oil
- A splash of white vinegar
Toss everything thoroughly (using your hands or chopsticks is best) until the potato strands are glossy and evenly coated. Transfer to a serving plate and enjoy immediately.
FAQ & Troubleshooting
Q: Why did my potatoes turn out mushy? A: This usually happens for two reasons: either you didn’t rinse the starch off thoroughly enough before cooking, or you overcooked them. Remember, 2-3 minutes is an estimate—watch for the transparency visual cue. Also, failing to shock them in cold water immediately will cause carry-over cooking.
Q: Can I keep this in the fridge? A: You can, but it is best served fresh. If you store it overnight, the salt will draw moisture out of the potatoes, and you will find a puddle of water at the bottom of the container the next day. If this happens, drain the liquid and add a little more scallion oil before serving.
Q: I don’t like raw garlic flavor. What can I do? A: You can blanch the minced garlic with the potatoes for the last 5 seconds, or fry the garlic in the scallion oil briefly to mellow out the sharpness.
Serving Suggestions
This is a classic side dish. It pairs beautifully with rich, braised meat dishes to cut through the grease.
- Serve with: Braised Pork Belly (Hong Shao Rou) or Tomato Egg Drop Soup.
- Make it a meal: Serve alongside rice and Steamed Egg with Minced Pork for a balanced, home-style Chinese dinner.
Nutrition Information (Estimate per serving)
- Calories: 145 kcal
- Carbohydrates: 20 g
- Protein: 2 g
- Fat: 7 g
- Saturated Fat: 1 g
- Cholesterol: 0 mg
- Sodium: 240 mg
- Potassium: 450 mg
- Fiber: 2 g
- Sugar: 1 g
- Vitamin A: 100 IU
- Vitamin C: 15 mg
- Calcium: 20 mg
- Iron: 1 mg
Disclaimer: Nutrition information is calculated using an ingredient database and should be considered an estimate. Garnishes and optional ingredients are not included. Actual values may vary depending on specific brands used and the exact size of the potatoes.
Food Safety & Preparation Notes
- Potato Safety: Do not consume potatoes that have turned green or have significant sprouting, as they may contain solanine, a natural toxin. Ensure the potato strips are cooked until translucent (not raw), as eating raw potatoes can cause digestive discomfort.
- Knife Safety: Potatoes can be slippery and unstable on a cutting board. Slice a thin piece off the bottom of the potato to create a flat, stable base before you begin slicing it into discs and shreds.
- Allergen Information: This dish is naturally vegan and gluten-free. However, it relies heavily on alliums (garlic and scallions). If you have a severe allium allergy, this dish is not recommended. Ensure your MSG and vinegar are certified gluten-free if you have celiac disease.
Authoritative References
For more on the science of potato starch and texture, you can refer to this guide by Serious Eats on Potato Varieties. For general food safety regarding vegetable preparation, check the USDA Food Safety Guidelines.
Scallion Oil Potato Strips (Liangban Tudou Si)
Equipment
- Mandoline Slicer (optional) For uniform shreds if knife skills are developing
- Large Pot For blanching
- Mixing Bowl For ice bath
Ingredients
Vegetables
- 2 medium Potatoes Russet or Yukon Gold, peeled
- 1 Green or Red Chili Pepper Seeds removed, shredded
- 1 clove Garlic Finely minced
Seasonings
- 2 tbsp Scallion Oil Homemade or store-bought
- 0.2 tsp Salt Adjust to taste
- 1 pinch MSG Optional, about 1/8 tsp
- 0.5 tsp White Vinegar Rice vinegar or distilled white
Instructions
- Slice the peeled potatoes into fine, uniform shreds (matchsticks).
- Place potato shreds immediately into a bowl of water. Rinse and change water multiple times until the water runs clear to remove starch.
- Remove seeds and ribs from the chili pepper and slice into fine shreds.
- Bring a large pot of water to a boil. Add the potato shreds. Blanch for 2-3 minutes. Watch for the potatoes to become fully transparent.
- Once potatoes are transparent, add the pepper shreds to the boiling water for 10 seconds.
- Immediately remove vegetables and plunge them into a prepared ice water bath to stop cooking and preserve crispness.
- Once cool, use your hands to lift the potatoes out of the water and squeeze gently to remove excess moisture (do not just pour them out). Place in a mixing bowl.
- Add minced garlic, MSG, salt, scallion oil, and white vinegar. Toss well to combine.
Notes
Nutrition information is calculated using an ingredient database and should be considered an estimate. Garnishes and optional ingredients are not included. Sodium content may vary depending on the exact amount of salt used. Allergen Note:
This recipe is naturally vegan and gluten-free (ensure your vinegar and MSG source are certified GF if strictly necessary). Contains Alliums (garlic, scallion). Flavor Tip:
For a nuttier flavor, you can add a drop of sesame oil, though traditional Scallion Oil Potato Strips rely primarily on the scallion flavor.
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