Quick Recipe Version (TL;DR)
Quick Ingredients
- 1 (13.5 oz / 400 ml) can full-fat coconut milk
- 1 large lemongrass stalk (about 2 oz / 55 g), bruised and cut into 3-inch pieces
- 3 garlic cloves, thinly sliced
- 4 kaffir lime leaves (fresh or frozen), torn
- 1 tbsp neutral oil (plus 1 tbsp more if pan is dry)
- 1/2 cup (120 ml) low-sodium chicken broth or vegetable broth
- 1 tbsp fish sauce (or 1 tbsp soy sauce for vegetarian)
- 2 tsp packed light brown sugar
- 1 tbsp fresh lime juice (about 1/2 lime), plus more to taste
- 1/4 tsp kosher salt (optional, to taste)
- 1/8 to 1/4 tsp crushed red pepper flakes (optional)
- Optional thickener: 1 tsp cornstarch + 1 tbsp cold water
- To finish: 2 tbsp chopped cilantro and/or thinly sliced scallions
Do This
- 1. Bruise lemongrass; tear lime leaves; slice garlic.
- 2. In a skillet over medium heat, warm oil and sauté garlic, lemongrass, and lime leaves for 60–90 seconds.
- 3. Add broth; simmer 2 minutes, scraping up browned bits.
- 4. Stir in coconut milk, fish sauce (or soy), sugar, and pepper flakes; gently simmer 6–8 minutes.
- 5. Remove aromatics; add lime juice; season to taste (salt/lime/fish sauce).
- 6. Spoon over cooked chicken or tofu (or return protein to pan for 2 minutes to coat). Garnish and serve.
Why You’ll Love This Recipe
- Big flavor with minimal effort: lemongrass, garlic, and lime leaves do most of the work.
- Creamy but bright: coconut milk gets balanced with lime and savory seasoning.
- Restaurant-style “pan sauce” energy that instantly upgrades chicken, tofu, rice, or noodles.
- Flexible: make it vegetarian, spicy, or extra tangy based on what you like.
Grocery List
- Produce: lemongrass (1 stalk), garlic (3 cloves), lime (1), cilantro (optional), scallions (optional)
- Dairy: none
- Pantry: full-fat coconut milk (1 can), neutral oil, broth (chicken or vegetable), fish sauce or soy sauce, light brown sugar, crushed red pepper flakes (optional), cornstarch (optional), kosher salt
Full Ingredients
For the sauce
- Full-fat coconut milk: 1 (13.5 oz / 400 ml) can
- Lemongrass: 1 large stalk (about 2 oz / 55 g)
- Garlic: 3 cloves, thinly sliced
- Kaffir lime leaves: 4 leaves, torn (fresh, frozen, or dried)
- Neutral oil: 1 tbsp (plus up to 1 tbsp more if needed)
- Low-sodium broth: 1/2 cup (120 ml) chicken broth or vegetable broth
- Fish sauce: 1 tbsp (or for vegetarian, 1 tbsp soy sauce)
- Light brown sugar: 2 tsp, packed
- Fresh lime juice: 1 tbsp (about 1/2 lime), plus more to taste
- Kosher salt: 1/4 tsp, optional (add only if needed)
- Crushed red pepper flakes: 1/8 to 1/4 tsp, optional
Optional thickener (for a glossier, clingier sauce)
- Cornstarch: 1 tsp
- Cold water: 1 tbsp
To serve (choose your favorite)
- Cooked chicken: 1 to 1 1/2 lb (450 to 680 g) seared or roasted chicken (thighs, breasts, cutlets, or shredded)
- Cooked tofu: 14 to 16 oz (400 to 450 g) extra-firm tofu, pressed and pan-seared
- Garnish: 2 tbsp chopped cilantro and/or 2 scallions, thinly sliced
- For serving: steamed jasmine rice, rice noodles, or sautéed greens
Step-by-Step Instructions
Step 1: Prep the aromatics
Trim the lemongrass by removing the dry top and the tough outer layers until you reach the pale, fragrant core. Cut into 3-inch pieces, then bruise each piece by gently smashing with the flat side of a knife or a rolling pin. This helps the lemongrass release its flavor quickly.
Thinly slice the garlic. Tear the kaffir lime leaves in half (this exposes more surface area for steeping).
Step 2: If using chicken or tofu, cook it first (and keep the pan)
This sauce is especially good when made in the same skillet you used for chicken or tofu because it picks up the browned bits.
For chicken (quick skillet method): Pat 1 to 1 1/2 lb chicken dry and season with 3/4 tsp kosher salt. Sear in a 12-inch skillet over medium-high heat with 1 tbsp neutral oil until browned and cooked through to 165°F (74°C) internal temperature (about 4–6 minutes per side for cutlets; longer for thicker pieces). Transfer chicken to a plate.
For tofu (quick skillet method): Press 14–16 oz extra-firm tofu for 10 minutes, cut into slabs or cubes, then sear over medium-high heat with 1 tbsp neutral oil until deeply golden (about 8–10 minutes total, turning occasionally). Transfer tofu to a plate.
If you’re starting with already-cooked chicken or tofu, simply begin the sauce in a clean skillet and use the oil amount listed.
Step 3: Bloom the aromatics in oil
Lower the heat to medium. If the skillet looks dry, add up to 1 tbsp more oil.
Add the sliced garlic, bruised lemongrass, and torn kaffir lime leaves. Cook, stirring often, for 60–90 seconds until the garlic smells fragrant and just barely starts to turn pale golden (avoid browning it deeply, which can taste bitter).
Step 4: Deglaze with broth and scrape up the flavorful bits
Pour in the 1/2 cup (120 ml) broth. Bring to a simmer and use a wooden spoon to scrape up any browned bits stuck to the pan (those are flavor). Simmer for 2 minutes to reduce slightly and to start infusing the aromatics.
Step 5: Add coconut milk and gently simmer to steep
Shake the can of coconut milk well before opening (or whisk in the can if it separated). Pour the coconut milk into the skillet.
Stir in the 1 tbsp fish sauce (or soy sauce), 2 tsp brown sugar, and crushed red pepper flakes if using.
Bring the sauce to a gentle simmer over medium to medium-low heat, then simmer for 6–8 minutes, stirring occasionally, until slightly thickened and glossy. Keep it at a gentle bubble (avoid a hard boil, which can split the coconut milk and make it look grainy).
Step 6: Optional: Thicken for a clingy pan-sauce finish
If you want the sauce to really coat chicken or tofu (especially helpful if you’re serving over vegetables), mix 1 tsp cornstarch with 1 tbsp cold water until smooth.
While the sauce is gently simmering, whisk in the slurry and cook for 60–90 seconds until the sauce turns silkier and slightly thicker.
Step 7: Strain out aromatics, brighten with lime, and season
Remove and discard the lemongrass pieces and lime leaves using tongs (or strain the sauce through a fine-mesh sieve if you prefer ultra-smooth sauce).
Turn off the heat. Stir in 1 tbsp fresh lime juice. Taste and adjust:
- More brightness: add lime juice, 1/2 tsp at a time.
- More savory depth: add a few drops more fish sauce (or soy).
- More sweetness: add a pinch more brown sugar to balance heat/tang.
- Salt: add up to 1/4 tsp kosher salt only if it tastes flat (fish sauce/soy often provides enough).
Step 8: Coat the chicken or tofu and serve
For the best “pan sauce” experience, return the cooked chicken or tofu to the skillet and spoon the sauce over it. Warm together over low heat for 2 minutes, just until everything is coated and hot.
Serve over jasmine rice or noodles. Finish with cilantro and/or scallions. If you like, add extra lime wedges at the table.
Pro Tips
- Bruise lemongrass well: smashing the stalk is the difference between mild and truly fragrant.
- Keep the simmer gentle: coconut milk is happiest at a low, steady bubble—high heat can make it look separated.
- Use pan drippings: making the sauce in the same skillet after searing chicken/tofu adds instant depth without extra ingredients.
- Start conservative with fish sauce: it deepens flavor quickly; you can always add a few drops at the end.
- Control thickness: reduce longer for a richer sauce, or use the cornstarch slurry for a glossy, clingy finish in under 2 minutes.
Variations
- Vegetarian and extra-umami: use soy sauce plus 1 tsp white miso (whisk it in off heat) instead of fish sauce.
- Spicy coconut-lime: add 1 thinly sliced red chile (or 1/2 tsp chile flakes) with the garlic, and finish with an extra 1/2 tbsp lime juice.
- Ginger version: add 1 tbsp finely grated fresh ginger with the garlic for a warmer, zingier profile.
Storage & Make-Ahead
Store cooled sauce in an airtight container in the refrigerator for up to 4 days. Reheat gently in a small saucepan over low heat, stirring often, until hot (about 3–5 minutes). If it thickens too much in the fridge, loosen with 1–3 tbsp water or broth. You can prep the aromatics (bruise lemongrass, slice garlic, tear lime leaves) up to 24 hours ahead and refrigerate them in a sealed container.
Nutrition (per serving)
Approximate, for sauce only (1/4 of recipe): 210 calories, 20 g fat, 7 g carbs, 2 g protein, 2 g sugar, 420 mg sodium. (Values vary by brand of coconut milk and whether fish sauce or soy sauce is used.)
