How to Cook Raw, Frozen Prawns

Planning a tasty seafood dinner but not sure if you’ve got time to defrost your frozen prawns? If you forgot to thaw your feast in the fridge overnight, don’t sweat—there are plenty of ways to quickly defrost them, or even cook them from frozen! In this article, we’ll show you the best ways to thaw prawns and prepare them no matter how icy they are. Let’s dig in!

Things You Should Know

Place frozen prawns in the fridge overnight to safely defrost them. If you’re in a hurry, place them in a bowl of cold salt water for about 20 minutes until thawed.
Once the prawns are defrosted, grill or sauté them for up to 5 minutes, or boil them in salt water for 3-6 minutes.
If you’re cooking directly from frozen, quickly rinse off any ice crystals before broiling, sautéeing, air frying, or poaching. Allow 1-2 extra minutes of cooking.

Section 1 of 3:

Defrosting Techniques

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1
Place frozen prawns in a container in the refrigerator to thaw overnight. This method takes a while, but it's also the easiest and safest, since the prawns will remain cold enough to prevent bacteria growth. Simply take the prawns out of their freezer bag and put them in a covered dish or container. Set them in the refrigerator overnight or for about 8 hours. They’ll be defrosted the next day.^{[1]
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- The prawns are thawed when they’re soft and easily bendable.^{[2]
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- Once the prawns are defrosted, they're ready to cook!
- Refrigerator-thawed prawns (and other raw proteins) are safe to refreeze without cooking since they never sat in unsafe, warm temperatures while thawing.^{[3]
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Soak the prawns in cold salt water for about 20 minutes for a faster thaw. For a rapid defrost, add 2 tbsp (34 g) of salt (for flavor) to 4 c (0.95 L) of cold water in a large bowl. Take the frozen prawns out of their bag and add them to the water, making sure they’re completely submerged. Leave them for 20 minutes, stirring occasionally to break up frozen clumps.^{[4]
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- Alternatively, place the prawns in a plastic bag or polybag, then put the bag in the water. This method may take longer (about 30 minutes).
- Afterward, lay the prawns on paper towels or a clean cloth for several minutes to drain the water off. They should feel squishy and bendable rather than solid.
- Do not refreeze prawns that were defrosted with cold water without cooking them first, as this can lead to bacteria growth and unwanted texture or flavor changes.^{[5]
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Thaw prawns under cold, running water for 5-10 minutes. Put the frozen prawns in a colander, then place them under cold, running water in your kitchen sink. As the water runs, move the prawns around to make sure each piece is equally exposed to the water.^{[6]
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- Make sure your water is cool or cold. Warm water can begin to cook the prawns, leading to uneven or overcooking later.
4
Steer clear of the microwave for defrosting frozen prawns. When you use the microwave to quickly thaw prawns, you end up partially cooking them on the outside. This makes you more likely to accidentally overcook them later, leading to chewy, rubbery prawns.^{[7]
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- It’s not unsafe to defrost prawns this way, but the taste and quality of your meal won’t be as good as with other defrosting methods.

Section 2 of 3:

Ways to Cook Defrosted Prawns

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Boil prawns in salt water for 3-6 minutes. Add 2 tbsp (34 g) of salt to about 8 c (1.9 L) of water in a pot (this should be enough water for about 1 lb (0.45 kg) of prawns). Bring the water to a boil, then pour in the prawns with the shells on. Once the water comes back to a boil, turn the heat down and cook the prawns for 3-6 minutes. Look for a pink and opaque color to tell if they’re cooked.^{[8]
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- The prawns will also float to the top when they're done.
- To stop the cooking process and avoid overcooking, place the prawns in a separate pot of ice water to blanch them as soon as they're done.
2
Cut the prawns butterfly-style and grill them for 3-5 minutes.^{[9]
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Expert Source

Randall Chambers
Personal Chef

Expert Interview. 26 October 2021.} First, heat up your grill. If it's a gas grill, set it to medium heat. If you have a charcoal grill, light it and then let the initial heat die down some before you grill the prawns. While the grill heats up, butterfly cut the prawns along the back, creating an opening. Pull the prawn open in the back, making a wide, flat prawn. Place the prawns on the grill, and cook them until they're pink and opaque, which usually takes just 3-5 minutes.^{[10]
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- If the prawns still have their shells, leave them on, but trim off the legs. You can still butterfly the prawns with their shells on.
- Optionally, coat the prawns in a little butter or oil before grilling them to add extra flavor.
3
Sauté prawns in a pan for 3-5 minutes. Place a pan over high heat and add a pat or 2 of butter and a spoonful of olive oil. Once the oil is hot and the butter is melted, add 1-2 cloves of minced garlic and let it cook by itself for 30-60 seconds. Pat your prawns dry and pour them in the pan with a sprinkle of salt and freshly ground black pepper. Cook for 3-5 minutes, stirring often.^{[11]
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- Try to leave some space between the prawns in the pan to avoid overcrowding and ensure they all cook evenly.
- Take the prawns off the heat when they turn pink and firm.^{[12]
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- For the best result, peel and devein the prawns before sautéing them. It’s OK if you leave the shells on, but it will take longer.

Section 3 of 3:

Ways to Cook Prawns from Frozen

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1
Rinse the prawns to remove ice crystals before roasting or sautéing. Place the prawns in a colander and run them under cool water for about a minute to break up clumps of frozen prawns and remove excess ice. This keeps unwanted water from diluting or soaking your main dish.^{[13]
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- Use shelled or unshelled prawns for these cooking methods.
2
Broil frozen prawns on high in the oven for 5-8 minutes. Place the rack in your oven about 6 inches (15 cm) from the broiler. Turn the broiler on high (500–550 °F (260–288 °C)) and set a rimmed baking sheet on the rack to heat up for 10 minutes. Toss the frozen, rinsed prawns in a seasoning mix of your choice, then add them to the heated baking sheet. Cook for 5-8 minutes.^{[14]
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- Play with whatever spices you enjoy! Try simple salt and pepper, a Cajun spice blend, taco seasoning, or a sprinkle of rosemary, basil, and garlic.
- If the prawns clump up together as you pour them onto the baking sheet, use tongs to spread them out.
- The prawns are done when they curl slightly and turn pink and firm.
3
Sauté frozen prawns in a pan with oil and garlic for 5-7 minutes. Add 1-2 tbsp (15-30 mL) of olive oil to a pan over high heat, then cook 1-2 cloves of minced garlic in the pan for about 1 minute. Pat your rinsed, frozen prawns dry and add them directly to the oil. Sprinkle on some salt and pepper and cook them for 5-7 minutes, stirring frequently, until they’re pink and firm.^{[15]
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- Try not to crowd the prawns in the pan, as they won't sear as well.
- For different flavors, try swapping out the minced garlic for chopped shallots, parsley, or coriander leaves.
4
Poach frozen prawns in boiling water with additional flavors of your choice. For 1 pound (0.45 kg) of prawns, fill a pot with about 8 to 9 cups (1.9 to 2.1 L) of water and at least ½ tsp (2.5 g) of salt over high heat. Stir in any other spices or flavors you'd like, like lemon juice or garlic cloves. Bring the pot to a boil, then remove it from the heat. Stir in the prawns and cover the pot to let them cook for 5-6 minutes.^{[16]
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- For poaching (or any “wet” cooking method), bang the bag of frozen prawns on the counter to break up clumps (no need to rinse).
- Try adding half a lemon with the juice squeezed in, 3-4 garlic cloves, ¼ of an onion, a handful of parsley, and/or 12-15 peppercorns. The amounts do not need to be precise, as you’re just adding flavor. Be as heavy-handed as you'd like!
5
Air fry frozen prawns at 400 °F (204 °C) for 8 minutes. Preheat your air fryer for 5 minutes while you rinse and remove ice crystals from the shrimp (no need to thaw). Pat the prawns dry and place them in a single layer in the air fryer basket, then fry for 4 minutes. Flip the prawns and cook for another 3-4 minutes.^{[17]
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- For extra flavor, brush the prawns with melted butter mixed with seasonings of your choice when you flip them.

Frozen Prawns Recipes

Sample Broiled Frozen Prawns Recipe

Sample Sauteed Frozen Prawns Recipe

Sample Poached Frozen Prawns Recipe

Sample Air Fryer Frozen Prawns Recipe

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How do I make butter sauce for the prawns?

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This answer was written by one of our trained team of researchers who validated it for accuracy and comprehensiveness.

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The easiest way would be to melt butter in a hot pan, then cook 1-2 cloves of minced garlic in the butter for 1 minute. Then, add prawns and cook them in the garlic butter.

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Once previously frozen prawns are cooked in Bouillabaise, can individual servings be frozen?

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This answer was written by one of our trained team of researchers who validated it for accuracy and comprehensiveness.

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Yes, once the prawns (or any seafood) have been cooked, they're safe to refreeze.

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How long do they keep once they are cooked?

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You should try to eat them immediately once they are cooked. They will stay for a day or two afterwards, but it is best to consume them once they are cooked.

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Things You'll Need

Colander
Pot or pan
Oven mitt
Salt
Oil or butter (optional)
Seasonings (optional)

Tips

Prawns and shrimp are technically different species, but they taste nearly identical and can be interchanged in recipes. Prawns are slightly larger usually, so they might take an extra 1-2 minutes to cook.

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Warnings

Don't defrost prawns at room temperature without water, as they may sit at an unsafe temperature for too long and grow bacteria.

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