Gaeng Om Gai is a traditional Isaan dish from the northeastern part of Thailand. It is a clear Thai chicken soup, sometimes described as a water-based curry or herbal chicken curry.
This soup relies on Isaan herbs, fermented seasonings, and fresh vegetables for flavor rather than coconut cream or palm sugar. The result is a fresh tasting, savory, slightly sour curry that reflects everyday food in Isaan cuisine.
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What Is Gaeng Om?
Gaeng Om is a traditional Isaan soup made without coconut milk. Instead of richness from fat, it gets its flavor from fresh herbs, chilies, toasted aromatics, and Pla Ra fermented fish sauce.
Although the word gaeng loosely translates to curry, Gaeng Om is closer to a clear Thai chicken soup. It’s brothy, aromatic, and herb-forward rather than thickened with coconut cream or curry paste.
Gaeng Om in Isaan Home Cooking
Gaeng Om is flexible and seasonal, built around whatever vegetables are available. Pumpkin or squash, cabbage, mushrooms, leafy greens, long beans, and baby corn are all commonly used depending on the time of year.
This is the kind of soup my family made when there was a little meat, a lot of vegetables, and a pot big enough to feed everyone. It’s light but bold, nourishing, and meant to be eaten with sticky rice as part of a shared meal.
What does Gaeng Om Taste like?
Gaeng Om is savory, aromatic, and deeply herbal, with a slight bitterness from fresh herbs and vegetables
Ingredients for Gaeng Om Gai
This Gaeng Om Gai keeps classic Isaan flavor while using ingredients that are easier to find outside Thailand. Heat, vegetables, and fermented intensity are flexible without losing authenticity.
- Chicken. Chicken thighs, breast, or bone in pieces work well for a rich, comforting broth.
- Liquid. Water, homemade chicken stock, or chicken broth depending on how deep you want the flavor.
- Thai chilies. Adjust to taste for mild to spicy Isaan heat.
- Shallots. Small Thai shallots add sweetness and depth.
- Garlic. Essential for the curry paste backbone.
- Squash or pumpkin. Cut into 2 inch pieces for body and natural sweetness.
- Greens. Green cabbage, bok choy, or yu choy all work well here.
- Beans. Long beans or green beans for crunch and freshness.
- Green onions. Add mild onion flavor and aroma.
- Fish sauce. Provides salty umami balance.
- Pla ra. Fermented freshwater fish sauce that defines Gaeng Om’s Isaan flavor.
- Khao khua. Toasted rice powder for nuttiness and slight thickness.
- Thai basil or lemon basil. Herbal lift and fragrance.
- Makrut lime leaves. Adds citrus aroma and depth.
- Lemongrass. Bright, clean flavor that rounds out the broth.
- MSG. Optional, but traditionally used to enhance savory flavor.
How to Make Gaeng Om Gai
- Start the broth. In a medium soup pot, combine aromatics, (lemongrass, kaffir lime leaves, and salt and the water). Bring to a boil.
- Make the paste. While the water is boiling, add chilies, garlic, and shallots into a rough paste using either a mortar and pestle or a spice grinder. It does not need to be smooth. A coarse texture is traditional.
- Add the paste. Stir the paste into the boiling broth and let it simmer briefly so the aromatics bloom.
- Add the chicken. Add the chicken and skim off any foam that rises to the surface. Simmer until the chicken is nearly cooked through.
- Add vegetables. Add the squash or pumpkin and cook for 3 to 4 minutes until just tender.
- Add cabbage and herbs. Add the cabbage next and let everything wilt gently. Do not overcook.
- Season and finish. Season with fish sauce, salt, pla ra, toasted rice powder, and MSG if using. Taste and adjust. The soup should be herbal, savory, and slightly funky. Add fresh dill and lemon basil last, stir it all in and ready to serve!
What to Serve with Gaeng Om Gai
Gaeng Om is best served with sticky rice and other Isaan dishes like green papaya salad, grilled meats, larb Gai, Laab Moo or beef larb, and Jeow Bong. It is not meant to be eaten alone. This is family food, meant to be shared.
Tips for the Best Flavor
- This soup tastes even better the next day
- Use bone in chicken if you want a richer broth
- Start with less pla ra and build up
- Dill is not optional here. It is a key Isaan flavor
Is Gaeng Om Gai the Same as Other Thai Curries?
No. Gaeng Om Gai is not the same as kaeng som, tom kha gai, or other Thai curries. It contains no coconut milk, coconut cream, or palm sugar. It belongs to a group of Isaan water based curries that rely on herbs, fermented fish sauce, and vegetables for flavor.
Storage and Reheating
Store leftovers in an airtight container in the refrigerator for up to three days. Reheat gently over medium heat to keep the herbs fresh.
Gaeng Om Variations
- Gaeng Om Moo made with pork
- Gaeng Om Neua made with beef
- Versions with bamboo shoots or mushrooms depending on season
FAQ
Gaeng Om can be mildly spicy or very spicy depending on how many chilies you use. The heat level is adjustable and traditionally varies by household.
Yes. While pla ra is traditional and gives Gaeng Om its signature flavor, you can reduce it or omit it. Substitute extra fish sauce and a pinch of salt, though the flavor will be milder.
Gaeng Om Gai (Isaan Herb Soup with Chicken)
- Total Time: 35 minutes
- Yield: 4 1x
- Diet: Low-Carb
Description
Gaeng Om Gai is a traditional Isaan dish from the northeastern part of Thailand. It is a clear Thai chicken soupsometimes described as a water based curry or herbal chicken curry.
Ingredients
Chicken and Broth
- 8 oz chicken thighs or breast or combo of both. You can also use wings or bone in pieces for more flavor
- 3 cups water
Paste
- 2 to 10 Thai dried chilies depending on heat preference.
- 4 garlic cloves
- 2 oz shallots or 1 large shallot
Vegetables
- 1 cup squash or pumpkin cut into 1.5 inch pieces
- 1 cup cabbage sliced into 3 inch pieces
Seasonings and Herbs
- 1 tablespoon fish sauce
- 1 teaspoon salt
- 2 tablespoons Pla Ra adjust to taste
- 1 half cup fresh dill, add more as preferred.
- 1 third cup holy basil or lemon basil.
- Optional: 2 tablespoons Khao Khua toasted rice powder
- Optional. 1 teaspoon MSG
Instructions
-
- Start the broth. In a medium soup pot, combine aromatics, (lemongrass, kaffir lime leaves, and salt and the water). Bring to a boil.
- Make the paste. While the water is boiling, add chilies, garlic, and shallots into a rough paste using either a mortar and pestle or a spice grinder. It does not need to be smooth. A coarse texture is traditional.
- Add the paste. Stir the paste into the boiling broth and let it simmer briefly so the aromatics bloom.
- Add the chicken. Add the chicken and skim off any foam that rises to the surface. Simmer until the chicken is nearly cooked through.
- Add vegetables. Add the squash or pumpkin and cook for 3 to 4 minutes until just tender.
- Add cabbage and herbs. Add the cabbage next and let everything wilt gently. Do not overcook.
- Season and finish. Season with fish sauce, salt, pla ra, toasted rice powder, and MSG if using. Taste and adjust. Thex soup should be herbal, savory, and slightly funky. Add fresh dill and lemon basil last, stir it all in and ready to serve!
Notes
- Dill is not optional here. It is a key Isaan flavor
- This soup tastes even better the next day
- Use bone in chicken if you want a richer broth
- Start with less pla ra and build up
- Prep Time: 20
- Cook Time: 15
- Category: Isaan food, Isaan recipes, soup
- Method: stove stop
- Cuisine: Thai
Hi there, I’m Suwanee!
I’m the person behind this Thai food blog. I spent the first thirteen years of my childhood in Thailand, where I fell in love with the flavors of Thai cooking. What started as sharing recipes from my kitchen has grown into a journey from home cook to restaurant chef — and now one of just eight contestants chosen nationwide for PBS’s The Great American Recipe, Season 4. You’re in the right place if you love to cook Thai food. Come by often, and let’s get cooking!
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