How To Cook Frozen King Crab Legs (The Best Way!)

If you buy Alaskan king crab legs at the grocery store, these giant clusters are almost always sold frozen. Wondering how to cook frozen king crab legs perfectly every time? I've tested every method, and I'm sharing the best way to turn those frozen beauties into restaurant-quality seafood at home.

If you grew up anything like me - nowhere near an ocean and in a blue collar neighborhood - crab legs were reserved for special occasions. I don't think I even saw a king crab leg until I was in my 20's. The good news? You can get restaurant-quality results at home for a fraction of the price.

As a full-time seafood recipe developer, I've cooked through more clusters of crab legs than I can count testing this. Baking wins every time - and I'll show you exactly why.

Should You Thaw Frozen Crab Legs First?

You don't have to - any cooking method below works with crab legs straight from the freezer. But if you have time, thawing does have advantages: more even heating and shorter cook times.

To thaw safely: Thaw covered in the refrigerator overnight. If you're short on time, place king crab legs in a large bowl of cold water for about 90 minutes. Never use warm water or leave crab legs out at room temperature.

Ingredients for Perfect King Crab Legs:

Alaskan king crab legs - the king of all crabs is what we're cooking here! If you have snow crab legs, never fear. This method also works for Snow Crab Legs, and can be a more budget-friendly option!

Full ingredient list and measurements included in the printable recipe card below.

How to Cook Frozen Crab Legs at Home:

1. Bake king crab legs

To begin, preheat your oven to 375℉. Arrange your king crab legs on a large sheet pan or baking sheet in a single layer.

Remember the crab legs are already cooked, so we are using the "cooking process" to evaporate the water inside the legs and re-heat the meat, without drying out our delicious crab legs. You'll know the crab is ready when it is fragrant and very warm to the touch.

2. Make lemon butter sauce

Add butter, a lightly crushed garlic clove and a pinch of salt to a small pan. Melt the butter and steep the garlic clove over medium heat for 4-5 minutes.

Add freshly squeezed lemon juice. Stir to combine, then taste. Add more lemon juice, if desired. Remove the crushed garlic clove before serving.

3. Split crab legs

For king crab, I use kitchen shears to gently split open each crab leg before serving to make it easier to remove all of the long pieces of crab inside the thicker legs.

4. Serve and enjoy

Serve your hot crab legs with lemon garlic butter and garnish with chives or parsley.

What about steaming or boiling crab legs?

I've tested both. Steaming works, but it adds fussiness (steamer basket, watching water levels) without adding flavor. Boiling is the one I'd skip - it leaches moisture from the meat and you lose that sweet, briny flavor into the water. If your oven is occupied, steaming is your best backup: 1 cup water, steamer basket, 6-7 minutes thawed or 8-10 from frozen.

How to Tell When Crab Legs Are Done

• Color: Shells should be bright orange-red.
• Aroma: You'll smell that sweet, ocean-y crab scent.
• Temperature: Shells should be hot to the touch and the meat should be steaming hot.

Common Mistakes to Avoid

• Overcooking: Remember, they're already cooked! You're just reheating. 
• Not splitting king crab shells: Those thick shells are tough - use kitchen shears to split them before serving. 
• Skipping the butter sauce: Trust me on this one. YOU NEED IT IN YOUR LIFE.

How Much Crab Per Person?

• Main course: ¾-1 pound per person
• Appetizer: ⅓-1/2 pound per person

Perfect Side Dishes for King Crab

I love serving corn on the cob and boiled potatoes, using the lemon garlic butter as a dipping sauce for everything. Tossed Mediterranean Salad adds freshness and crunch. Napa Coleslaw is another favorite.

Storing Leftover Crab Legs

Remove the meat from the shells and store in an airtight container in the refrigerator. Use within 48 hours - crab is delicate and doesn't improve with time in the fridge. Don't toss the shells - freeze them and use them to make a rich shellfish stock.

How to Reheat Crab Legs

Remember, crab legs arrive at your door already cooked - so you're warming leftover meat that's been through the oven once. Gentle is the word - high heat will tighten the protein and dry it out fast. Add your crab meat to a small pan with a spoonful of butter over low heat, just until warmed through. Two to three minutes is usually enough. Or use leftover crab meat in king crab temaki rolls or crab-stuffed salmon.

Leftover crab meat is also excellent cold - straight from the fridge, piled onto a salad or tucked into a sandwich.

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