Spicy Lemongrass Beef Noodle Salad (Bun Bo Xao)
A vibrant and complex Vietnamese noodle salad featuring stir-fried marinated beef with a punch of chili, lemongrass, and fish sauce. This dish offers a delightful balance of savory, spicy, and umami flavors, perfect for a satisfying lunch.

Prep Time
75 min
Difficulty
Hard
Servings
4
Calories
550 kcal
Instructions
- 1
Slice the beef thinly against the grain. In a large bowl, combine the sliced beef with minced lemongrass, garlic, shallots, sliced chilies, 3 tablespoons fish sauce, 1 tablespoon soy sauce, and 1 teaspoon brown sugar. Marinate for at least 30 minutes, or up to 2 hours in the refrigerator.
~15 min - 2
Prepare the Nuoc Cham: In a small bowl, whisk together 4 tablespoons fish sauce, 3 tablespoons lime juice, 4 tablespoons water, and 2 tablespoons granulated sugar until the sugar dissolves. Stir in minced garlic and chopped chili if using. Set aside.
~5 min - 3
Cook the rice vermicelli noodles according to package directions in a large pot of boiling water. Drain thoroughly in a colander and rinse with cold water to prevent sticking. Set aside.
~10 min - 4
Heat 3 tablespoons of vegetable oil in a wok or large skillet over high heat. Add the marinated beef in a single layer (cook in batches if necessary to avoid overcrowding) and stir-fry for 2-3 minutes until browned and cooked through.
~5 min - 5
Assemble the bowls: Divide the cooked vermicelli noodles among four serving bowls. Top generously with fresh bean sprouts, mint leaves, cilantro leaves, and the stir-fried beef. Sprinkle with chopped roasted peanuts.
~5 min - 6
Serve immediately with lime wedges and a side of Nuoc Cham for dipping or drizzling over the noodles.
Tips
- For a deeper flavor, marinate the beef overnight in the refrigerator. Ensure the lemongrass is very finely minced to avoid woody pieces.
- The Nuoc Cham can be made ahead of time and stored in an airtight container in the refrigerator for up to 3 days. Adjust the spice level by adding more or fewer chilies.
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