By Bill Ohaire | Published: April 2026 | Last Updated: April 2026

Flavourful BBQ marinade with fresh herbs

Photo by Jonathan Borba on Pexels

Quick Answer

Chimichurri Prawns Marinade: Combine 1 cup flat-leaf parsley (finely chopped), 4 cloves garlic (minced), 2 tbsp fresh oregano (or 1 tbsp dried), and more. Marinate 15-30 minutes. Grill until internal temp reaches 63°C (145°F) — opaque and pink.

About This Marinade

This chimichurri marinade brings a herby, garlicky, vibrant flavour profile to your prawns. An Argentine classic. Use as both a marinade and a finishing sauce. Best made fresh.

Prep Time

10 minutes

Marinate Time

15-30 min

Flavour Profile

herby, garlicky, vibrant

Best Cuts

king prawns (shell-on or peeled), tiger prawns

Ingredients

IngredientAmount
flat-leaf parsley (finely chopped)1 cup
garlic (minced)4 cloves
fresh oregano (or 1 tbsp dried)2 tbsp
olive oil80ml
red wine vinegar2 tbsp
chilli flakes1 tsp
salt and pepperAs needed

Prawns cook fast and absorb flavour fast. NEVER marinate prawns longer than 30 minutes in acidic marinades — the acid will start "cooking" them and they'll turn rubbery.

How to Make Chimichurri Prawns Marinade

  1. Combine: Mix all marinade ingredients in a bowl or ziplock bag until well combined.
  2. Prep the prawns: Pat the prawns dry with paper towel. Peel and devein if desired, or leave shell on for extra flavour.
  3. Marinate: Add the prawns to the marinade, making sure every piece is well coated. Refrigerate for 15-30 minutes (no longer!).
  4. Bring to temp: Remove from the fridge 20-30 minutes before cooking to take the chill off.
  5. BBQ: Shake off excess marinade and grill over high heat (220-250°C / 425-480°F) until the internal temperature reaches 63°C (145°F) — opaque and pink.
  6. Rest: Let the prawns rest for 1-2 minutes before serving.

Tips for the Best Chimichurri Prawns

Common Mistakes to Avoid

Best Prawns Cuts for Chimichurri Marinade

The best cuts of prawns for this marinade are: king prawns (shell-on or peeled), tiger prawns.

King prawns and tiger prawns are ideal — they're large enough to handle on the BBQ and have a sweet, firm flesh that stands up to bold flavours.

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Frequently Asked Questions

How long should I marinate prawns in chimichurri marinade?

Marinate prawns in chimichurri marinade for 15-30 minutes maximum. Any longer and the acid will start breaking down the delicate flesh.

Can I use chimichurri marinade on other meats?

Yes! Chimichurri marinade works well on chicken and beef too. Adjust the marinating time based on the protein — delicate proteins need less time.

Should I marinate prawns in the fridge or at room temperature?

Always marinate in the fridge for food safety. Bacteria multiply rapidly at room temperature. Take the meat out 20-30 minutes before cooking to take the chill off for more even cooking.

What temperature should I BBQ chimichurri marinated prawns?

Grill chimichurri marinated prawns over high heat (220-250°C / 425-480°F). Cook until the internal temperature reaches 63°C (145°F) — opaque and pink.

Related BBQ Guides

Sources & References

1
AmazingRibs.com
Science-based seafood grilling techniques and temperature guides.
Reference
2
America's Test Kitchen (YouTube)
Tested methods for perfectly grilled fish and shellfish.
Video
3
How to BBQ Right (YouTube)
Malcom Reed's seafood smoking and grilling tutorials.
Video
4
Serious Eats
Kenji Lopez-Alt's science of grilling fish without sticking.
Reference