Coconut Lime Grilled Prawns

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These coconut lime grilled prawns come together fast, but the marinade does real work. Coconut milk keeps the prawns moist on a hot grill, lime zest sharpens the flavor, and a little fish sauce adds depth without tasting fishy — the same balance that makes a lemongrass coconut curry so well-rounded.

I use large, shell-on prawns here because the shells protect the meat from the direct heat and you lose less juice. If you only have peeled prawns, they still work, just watch the timing closely.

The marinade needs about 20 minutes, not hours. These prawns are thin enough that a long soak can actually start to break down the texture. A quick 20-minute rest in the fridge is enough.

Why You’ll Love This Recipe

• Ready in under 30 minutes from fridge to plate
• Coconut milk keeps prawns juicy on a fierce grill
• Bright lime zest balances the rich marinade cleanly
• Works on a charcoal grill, gas grill, or grill pan

Ingredient Notes

• Large prawns (shell-on): Shell-on prawns around 16-20 count per pound hold up best on the grill. Peeled prawns work but cook about 1 minute faster, so watch them.
• Full-fat coconut milk: Use full-fat, not light. The fat helps the marinade cling to the prawns and caramelizes slightly on the grill. Shake the can well before opening.
• Fresh lime: You need both zest and juice. The zest carries the fragrant oils that bottled lime juice can’t replicate. One large lime yields about 1 tsp zest and 2 tbsp juice.
• Fish sauce: I use 1 tablespoon for umami backbone. Soy sauce is a workable substitute for a pescatarian-free version, though the flavor shifts slightly.
• Garlic: Fresh minced garlic is worth it here. Garlic powder can burn unevenly on the grill and turns bitter at high heat.
• Red chili flakes: Optional but recommended for a low-level background heat. A fresh sliced red chili stirred into the marinade gives a cleaner flavor if you have one.

Coconut Lime Grilled Prawns

Coconut lime grilled prawns marinated in coconut milk, lime, garlic, and fish sauce, then grilled over high heat until lightly charred.

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Prep Time 10 minutes mins

Cook Time 10 minutes mins

Total Time 40 minutes mins

Servings: 4 servings

Calories: 245

Ingredients Method Notes

Ingredients

  

Prawns

• 800 g large shell-on prawns, deveined 16-20 count, thawed if frozen and patted dry

Coconut Lime Marinade

• 120 ml full-fat coconut milk from a well-shaken can
• 1 tsp lime zest from 1 large lime
• 2 tbsp fresh lime juice about 1 large lime
• 3 cloves garlic cloves, finely minced
• 1 tbsp fish sauce use gluten-free brand if needed; soy sauce works as a substitute
• 1 tsp light brown sugar balances the lime acidity
• 0.5 tsp red chili flakes optional, or use 1 fresh red chili, sliced
• 1 tbsp neutral oil (sunflower or avocado) helps prevent sticking on the grill
• 0.25 tsp salt

To Serve

• 1 lime lime wedges cut into wedges
• small handful fresh cilantro leaves optional

Method

 

Make the Marinade

1. Whisk the coconut milk, lime zest, lime juice, minced garlic, fish sauce, brown sugar, chili flakes, oil, and salt together in a medium mixing bowl until the sugar dissolves.
2. Pat the prawns completely dry with paper towels, then add them to the marinade and toss to coat.
3. Cover the bowl and refrigerate for 20 minutes. Do not exceed 30 minutes or the lime will begin to break down the texture of the prawns.

Prepare and Preheat the Grill

1. Preheat your grill to high heat, around 230 C / 450 F. If using a cast-iron grill pan, set it over high heat for at least 5 minutes until smoking hot.
2. Thread the marinated prawns onto doubled skewers, leaving about 1 cm between each prawn so they cook evenly and don't steam each other.

Grill the Prawns

1. Brush the grill grates lightly with oil using a folded paper towel held with tongs. Place the prawn skewers on the grill.
2. Grill for 2 to 3 minutes on the first side, without moving, until you see clear char marks and the shells have turned bright pink-orange at the edges.
3. Flip the skewers and grill for a further 2 minutes on the second side until the flesh is fully opaque and the prawns curl into a loose C shape.
4. Remove from the grill immediately and squeeze fresh lime juice over the hot prawns.

Serve

1. Slide the prawns off the skewers onto a serving platter. Scatter fresh cilantro over the top and arrange lime wedges alongside. Serve immediately.

Notes

If you're cooking on a charcoal grill, let the coals ash over fully before grilling, direct flames scorch the coconut milk solids and turn the marinade bitter before the prawns are cooked through.

Tips for Success

• Pat the prawns completely dry before adding marinade so it sticks rather than slides off.
• Preheat the grill to high, around 230 C / 450 F, before the prawns hit the grates to get char marks quickly.
• Thread prawns on doubled skewers so they don’t spin when you flip them on the grill.
• Grill shell-on prawns no more than 2 to 3 minutes per side to avoid rubbery texture.
• Squeeze fresh lime directly over the prawns as they come off the grill, while still hot, so the juice absorbs.

Variations

• Swap prawns for scallops and grill 90 seconds per side for the same coconut lime flavor.
• Add 1 tsp turmeric and 1 tsp lemongrass paste to the marinade for a Southeast Asian slant.
• Use the same marinade on chicken thighs, grilling 5 to 6 minutes per side over medium-high heat.

Storage and Reheating

Store leftover grilled prawns in an airtight container in the fridge for up to 2 days. The texture holds reasonably well but shell-on prawns dry out faster once reheated.

To reheat, warm them in a dry skillet over medium heat for 1 to 2 minutes per side, just until heated through. Avoid the microwave, it turns the flesh rubbery. A squeeze of fresh lime after reheating brings the brightness back.

These prawns don’t freeze well after grilling. The texture becomes spongy once thawed. If you want to prep ahead, freeze the raw prawns in the marinade and thaw overnight in the fridge before grilling.

Serving Suggestions

Coconut lime grilled prawns work well over steamed jasmine rice or coconut rice, which picks up the char juices that drip from the skewers. A simple cucumber and herb salad on the side keeps the plate light.

For a more substantial spread, serve them alongside crispy skin snapper with mango salad, grilled corn, and extra lime wedges. A cold glass of crisp lager or a sparkling water with lime fits the meal better than anything heavy.

They also work tucked into lettuce cups with rice noodles, shredded cabbage, and a drizzle of sweet chili sauce for a casual handheld option.

FAQ

Why are my coconut lime grilled prawns rubbery?

Rubbery prawns almost always mean they were overcooked. At high grill heat, large prawns need only 2 to 3 minutes per side. Pull them the moment the flesh turns opaque and curls into a loose C shape, not a tight O.

Can I use coconut cream instead of coconut milk for the marinade?

Yes, coconut cream works and makes the marinade slightly thicker and richer. Thin it with 2 tablespoons of water so it coats the prawns evenly rather than clumping on the shells.

How far ahead can I marinate the prawns in the coconut lime mixture?

20 to 30 minutes in the fridge is the sweet spot. Beyond 1 hour, the lime juice starts to denature the protein in the prawns, giving the outer layer a slightly mushy, ceviche-like texture before they even hit the grill.

What dipping sauce goes well with coconut lime grilled prawns?

A simple sweet chili sauce is the easiest match. A quick sauce of fish sauce, lime juice, sugar, and minced chili also works well and echoes the marinade flavors without competing.

Are coconut lime grilled prawns gluten-free?

Yes, as written this recipe is gluten-free. Just confirm your fish sauce brand is gluten-free, as some contain wheat. Tiparos and Squid Brand are both gluten-free options.

How do I know when coconut lime grilled prawns are fully cooked?

Look for three signs: the shell turns bright pink-orange, the flesh is white and opaque all the way through, and the prawn curls into a loose C shape. A tight curl means overcooked.