Cambodian Oxtail Soup Recipe: Fragrant Lemongrass and Galangal Elixir

This Cambodian oxtail soup recipe delivers the rich, aromatic essence of Kuy Chaa—where tender oxtail simmers for hours in a fragrant broth infused with lemongrass, galangal, and kaffir lime leaves.

The result is a deeply flavorful soup that balances sweet, sour, and umami notes in every spoonful, a staple in Cambodian cuisine that feels like a warm embrace in a bowl.

I've perfected this recipe through years of testing, ensuring the broth develops layers of complexity while the oxtail becomes melt-in-your-mouth tender.

The secret to authentic Cambodian oxtail soup lies in the slow simmering process, which transforms tough oxtail into succulent pieces while extracting maximum flavor from the aromatic herbs and spices.

This recipe requires patience—about 3 hours of simmering—but the reward is a soup so rich and fragrant that it becomes the centerpiece of any meal.

The broth is carefully balanced with fish sauce for depth, palm sugar for subtle sweetness, and lime juice for brightness, creating a harmony that's both comforting and vibrant.

By the time you serve this soup, you'll have a dish that's as visually appealing as it is delicious—golden oxtail pieces floating in a fragrant, amber-colored broth, garnished with fresh herbs and a squeeze of lime.

The aroma alone will draw everyone to the table, while the first bite delivers layers of flavor that linger long after the last spoonful. This is the kind of soup that tastes even better the next day, making it perfect for meal prep or feeding a crowd.

Serve it with steamed jasmine rice to soak up every last drop of that fragrant broth, and pair it with fresh herbs like cilantro, mint, or Thai basil for an authentic Cambodian touch.

The leftovers reheat beautifully, making this recipe both practical and unforgettable. Let's bring the flavors of Cambodia to your kitchen.

Ingredients for cambodian oxtail soup

Six aromatic ingredients transform tough oxtail into melt-in-your-mouth Cambodian comfort.

The oxtail is non-negotiable here—look for well-marbled cuts at your butcher or Costco. If you can't find fresh galangal, substitute ginger at half the amount, but it won't be the same. Lemongrass should be bright green and firm—avoid any stalks with brown spots. Kaffir lime leaves are the secret weapon: find them at Asian markets or order online. I always pick up extra coconut milk—full-fat is essential—and Red Boat fish sauce, which adds that authentic umami punch. For palm sugar, Trader Joe's carries it, but brown sugar works in a pinch.

No galangal? Ginger plus a pinch of turmeric mimics some of its earthy warmth. Short on fish sauce? Soy sauce at half the amount gets you close, though it won't be identical. Want more heat? Add extra chili paste or a dash of cayenne. The lime juice is key—use freshly squeezed for that bright, tangy finish. If you can't find Thai chili paste, mix cayenne with a bit of honey for sweetness. For the shallots, peel and roughly chop—no need to be precise. The garlic should be smashed, not minced, so it infuses the broth gradually.

This soup tastes even better the next day, so make a big batch. Store the broth and oxtail separately in the fridge for up to 4 days, then reheat gently. The rice should be cooked just before serving—steamed jasmine rice is traditional. Garnish with fresh cilantro and mint right before eating. Freezes beautifully for up to 3 months—just thaw overnight in the fridge. The broth alone reheats wonderfully for quick lunches.

Step-by-step instructions for Cambodian oxtail soup

Here's how to create this aromatic, comforting soup with tender oxtail and fragrant Southeast Asian spices.

Start by cutting the 3 lb oxtail into 2-inch pieces, trimming away any excess fat. This size ensures even cooking and maximum tenderness. Place the oxtail pieces in a large stockpot and set aside.

Next, prepare the aromatic base by bruising the bottom 6 inches of all 6 whole lemongrass stalks with the flat side of a knife. This releases their essential oils and intensifies the flavor. Add these to the pot along with the 4 slices of peeled galangal and the 6 whole kaffir lime leaves that have been torn into pieces. These ingredients form the soul of the soup, so don't skip this step.

Add the 1 lb of peeled, roughly chopped shallots and the 12 peeled, smashed garlic cloves. The shallots will caramelize slightly during cooking, adding depth to the broth. Give everything a gentle stir to combine all the aromatics with the oxtail.

Place the stockpot over medium-high heat and add 8 cups of water. Bring to a boil, then reduce heat to medium-low and let it simmer uncovered for 1 hour. This initial simmer helps extract flavors from the oxtail and aromatics while preventing the broth from becoming cloudy.

After 1 hour, skim off any foam that rises to the surface using a fine-mesh skimmer. This ensures a clear, clean broth. Add the 2 tbsp of Thai chili paste and 2 tsp of salt, stirring to distribute evenly. The chili paste will infuse the broth with subtle heat, while the salt enhances all the flavors.

Continue simmering for another 1 hour, or until the oxtail is fork-tender and easily pulls apart. The broth should now be rich and deeply aromatic, with the lemongrass and galangal perfuming the air. If the broth reduces too much, add water as needed to maintain a good liquid level.

Once the oxtail is tender, stir in both 2 cans of full-fat coconut milk. The coconut milk adds a velvety texture and balances the bold flavors of the broth. Add the 0.5 cup of fish sauce and 0.25 cup of palm sugar, stirring well to combine. The fish sauce brings umami depth, while the palm sugar adds just enough sweetness to complement the savory elements.

Simmer the soup for an additional 30 minutes on low heat. This allows the coconut milk to fully integrate and the flavors to meld together. Taste the broth and adjust seasoning if needed—you might need a bit more fish sauce for saltiness or palm sugar for sweetness, depending on your preference.

Finally, stir in the 0.5 cup of freshly squeezed lime juice. This brightens the entire dish, cutting through the richness of the coconut milk and adding a refreshing finish. The lime juice should be added just before serving to preserve its vibrant flavor.

Remove the pot from heat and let the soup rest for 10 minutes. This allows the flavors to settle and the oxtail to absorb any remaining broth. Discard the lemongrass stalks, galangal slices, and kaffir lime leaves—they've done their job infusing flavor.

Ladle the soup into bowls and garnish each serving with 1 tablespoon of chopped fresh cilantro and 1 tablespoon of mint leaves. The herbs add a fresh, vibrant contrast to the rich, spiced broth. Serve immediately with steamed 3 cups of jasmine rice on the side to soak up every last drop of this fragrant elixir.

Each spoonful should deliver tender oxtail, aromatic broth, and a perfect balance of sweet, sour, and spicy flavors. The coconut milk adds a luxurious creaminess, while the lime juice ensures the dish is bright and refreshing.

Regional styles of cambodian oxtail soup

Phnom Penh Classic

This is the most traditional version of Cambodian oxtail soup, served in Phnom Penh's bustling markets and family homes. The key difference here is the addition of 1 tbsp of palm sugar during the final simmer, which creates a delicate sweetness that balances the broth's savory depth.

I always use steamed glutinous rice instead of jasmine for this version, as it's more traditional in the capital. The soup is typically served with a side of pickled mustard greens to cut through the richness. 🌿

Northern Khmer Style

In Cambodia's northern regions like Battambang, the soup incorporates dried shrimp (about 2 tbsp) during the initial simmer for an extra layer of umami. The broth is often slightly lighter, using 1 can of coconut milk instead of 2, to highlight the oxtail's natural flavor.

I add 1 tbsp of tamarind paste along with the lime juice for a tangier profile. The presentation often includes thinly sliced cucumbers on top for crunch. 🍋

Southern Coastal Adaptation

Near the coast, this soup becomes a seafood fusion. Locals add 6 oz of shrimp or 1 lb of clams during the last 30 minutes of cooking. The extra seafood gives the broth a briny depth while keeping the dish light enough for warm coastal evenings.

I recommend using 1 tbsp of shrimp paste (instead of fish sauce) for a more authentic coastal flavor. Serve with grilled rice cakes instead of jasmine rice. 🌊

Modern Urban Twist

For a contemporary take, many urban Cambodians add 1 cup of baby corn and ½ cup of bamboo shoots during the final 20 minutes of cooking. The texture contrast makes this a popular restaurant version.

I also incorporate 1 tbsp of miso paste when adding the coconut milk for a subtle fermented depth. Garnish with crispy fried shallots for added crunch and visual appeal. 🌟

Rural Farmhouse Version

In rural areas, this soup often uses less expensive cuts like beef shank instead of oxtail, though the technique remains identical. The broth is made with homemade fish sauce (if available) and wild herbs like water spinach or morning glory added at the end.

I've seen families use palm sugar from their own trees for an even more authentic touch. The simplicity highlights the natural flavors without any shortcuts. 🌱

Festive Banquet Style

For special occasions, Cambodians prepare an extra-rich version with oxtail braised in coconut milk before adding to the broth. The soup is served with gold leaf on top as a decorative (and edible) garnish.

I recommend adding 1 tsp of star anise during the initial simmer for a subtle aromatic complexity. This version is always accompanied by steamed pandan leaves wrapped around the rice for presentation. ✨

Frequently asked questions