Best Substitutes for King Prawns
King prawns are large crustaceans, typically 16-20 count per pound (meaning 16-20 pieces weigh 1 pound). They provide firm, sweet meat with a mild ocean flavor and meaty texture that holds up to grilling, sautéing, and roasting. King prawns cook in 2-3 minutes per side and turn pink when done. Their size makes them the star of dishes rather than just an ingredient. When substituting, you need to match three key qualities: the sweet, briny flavor, the firm bite that doesn't turn mushy, and the visual impact of substantial pieces. Most seafood swaps work at a 1:1 weight ratio, but cooking times change significantly.
Best Overall Substitute
Large shrimp (16-20 count) at a 1:1 weight ratio. They're virtually identical to king prawns in size, texture, and flavor. Both are crustaceans with the same sweet taste and firm bite. Cooking time stays exactly the same at 2-3 minutes per side.
All Substitutes
Large shrimp (16-20 count)
1:1 by weightLarge shrimp are essentially the same as king prawns. Both are 16-20 count per pound with identical cooking times of 2-3 minutes per side. The sweet, mild flavor matches perfectly. Some regions call large shrimp 'prawns' and vice versa, so you might already have the right thing. Look for firm, translucent flesh that smells like ocean water, not fish.
Tiger prawns
1:1 by weightTiger prawns are slightly larger than king prawns, usually 12-15 count per pound. They have distinctive dark stripes that disappear when cooked. The meat is equally sweet but has a firmer bite. Cook for 3-4 minutes per side instead of 2-3. They work perfectly in any recipe calling for king prawns.
Jumbo shrimp (12-15 count)
1:1 by weightJumbo shrimp are larger than king prawns but work identically in recipes. Each piece weighs about 1.5 ounces vs 1 ounce for king prawns. Cooking time increases to 3-4 minutes per side. The flavor is sweet and mild with the same firm texture. You'll get fewer pieces for the same weight.
Sea scallops
1:1 by weightSea scallops provide similar sweetness and firm texture but taste more buttery than briny. Each scallop weighs about 1 ounce, matching king prawn size. Cook for 2-3 minutes per side until golden brown. Remove the side muscle before cooking. They sear beautifully and add elegance to dishes.
Langostino tails
1:1 by weightLangostino tails taste like a cross between shrimp and lobster. They're pre-cooked, so just heat through for 1-2 minutes. The texture is slightly softer than prawns but the sweet flavor works well. More expensive than prawns but adds luxury feel to dishes.
Lobster tail meat
3/4 cup lobster per 1 cup prawnsLobster meat has richer, sweeter flavor than prawns with similar firm texture. Use less because it's more intense. Pre-cooked lobster just needs 1-2 minutes to heat through. Raw lobster cooks in 3-4 minutes. Expensive but turns ordinary dishes into special meals.
Firm white fish chunks
1:1 by weightMonkfish, halibut, or cod cut into 1-inch chunks provide firm texture without shellfish flavor. The taste is milder and less sweet than prawns. Cook for 4-5 minutes until flakes easily. Best when you need the texture but want to avoid shellfish allergens.
Chicken breast chunks
3/4 pound chicken per 1 pound prawnsCut chicken breast into 1-inch cubes for similar bite size. Cook for 6-8 minutes until internal temperature hits 165F. The flavor is completely different but provides protein and substance. Use less chicken because it's denser and more filling than prawns.
How to Adjust Your Recipe
Cooking times vary significantly between substitutes. Large shrimp and tiger prawns cook in 2-4 minutes per side like king prawns. Scallops need 2-3 minutes per side for proper browning. Pre-cooked options like langostino just need 1-2 minutes to heat through.
For grilled substitutes, use medium-high heat (about 400F). Thread onto skewers to prevent small pieces from falling through grates. Oil the grates well since seafood sticks easily.
In soups and stews, add delicate substitutes like scallops and cooked langostino in the last 5 minutes. Firmer options like tiger prawns and fish chunks can simmer for 10-15 minutes without overcooking.
When Not to Substitute
Prawn-focused dishes like garlic chilli prawns lose their identity with non-seafood substitutes. The sweet, briny flavor is essential to the dish's character. Tempura recipes work best with actual prawns or shrimp because the batter is designed for their specific moisture content and cooking time.
Avoid substituting in dishes where the curved prawn shape matters visually, like prawn cocktails or certain appetizers. Some curries and Asian dishes depend on the specific sweetness that only crustaceans provide.
Frequently Asked Questions
What's the difference between prawns and shrimp?
Prawns and shrimp are often used interchangeably, but prawns are typically larger with straighter bodies. King prawns are usually 16-20 count per pound, while large shrimp can be 21-25 count. Cooking methods and times are identical. In many recipes, the terms are completely interchangeable.
How do I know when prawns are cooked?
Prawns turn pink and opaque when cooked, taking 2-3 minutes per side. They curl into a C-shape when done properly. Overcooked prawns curl into tight O-shapes and become rubbery. Internal temperature should reach 145F. Raw prawns are translucent gray, cooked prawns are pink and white.
Can I use frozen prawns instead of fresh?
Yes, thaw frozen prawns completely before cooking. Pat them dry with paper towels to remove excess water. Cooking time stays the same at 2-3 minutes per side. Frozen prawns are often fresher than 'fresh' ones that sat on ice for days. Look for prawns frozen within 24 hours of catching.
How much do king prawns shrink when cooked?
King prawns shrink about 20-25% when cooked, losing mostly water weight. A 1-pound bag of raw prawns yields about 12-13 ounces cooked weight. Factor this into portion planning. Buy 1.25 pounds raw prawns if you need 1 pound cooked for a recipe.
Should I remove prawn shells before or after cooking?
Shell-on prawns have more flavor but are messier to eat. Remove shells before cooking for pasta, stir-fries, and curries. Cook with shells on for grilled dishes, boils, and when presentation matters. Shells add flavor to stocks and broths, so save them for cooking liquid.