Introduction

There’s a specific kind of afternoon that leads to this bowl. The kind where you’ve just come back from the dock, or maybe you just picked up a little extra crab and shrimp at the fish market because it looked too good to leave behind. You’re not trying to cook anything fancy, unlike some of those more involved easy seafood boil recipes. You just want something cold, something that tastes like the coast, and something that comes together before the sun finishes setting. That’s exactly where this seafood pasta salad crab and shrimp recipe lives.

I made this the first time almost by accident. I had leftover rotini, a half pound of cooked shrimp in the fridge, and a small container of crab meat I’d been saving for something I never got around to making. Threw it all together with some mayo, a squeeze of lemon, a little celery for crunch. My husband came in off the water, sat down, and ate two bowls without saying a word. That’s usually the best review I get.

This easy seafood pasta salad crab and shrimp dish has been on our table every summer since. It’s the kind of thing you bring to a cookout and people ask for the recipe. It’s also the kind of thing you eat standing at the counter at 11pm because it’s just sitting there in the fridge and it’s that good cold.

Why You’ll Love This Recipe

• It comes together fast — once your pasta is cooked and cooled, the whole thing takes maybe ten minutes to pull together. No hovering over a stove.
• The flavor is genuinely coastal — crab and shrimp together in one bowl with a creamy, lemony dressing tastes like something you’d eat at a little seafood shack by the water, not something you made at home on a Tuesday.
• Anyone can make it — no special skills, no fancy equipment. If you can boil pasta and stir things together, you’ve got this.

Quick Recipe Snapshot

Recipe: Seafood Pasta Salad Crab and Shrimp
Prep Time: 15 minutes
Cook Time: 20 minutes (pasta boiling)
Chill Time: 30 minutes recommended
Total Time: About 1 hour with chill
Servings: 4
Difficulty: Easy — beginner friendly
Best For: Lunch, dinner, cookouts, meal prep
Serve: Cold or room temperature

Ingredients List

The Pasta Base

• 3 cups dry rotini pasta — the spirals hold onto the dressing really well, better than most shapes
• 1 tsp salt — for the pasta water, don’t skip this

The Seafood

• ½ lb cooked medium shrimp, peeled and deveined — fresh or thawed frozen both work here
• 8 oz lump crab meat — canned is totally fine, just drain it well and pick through for shells

The Vegetables

• 3 stalks celery, finely chopped — this is what gives the whole thing that satisfying crunch
• ½ red bell pepper, diced small
• 3 green onions, sliced thin
• ¼ cup frozen peas, thawed — optional but they add a little sweetness that works nicely

The Dressing

• ½ cup mayonnaise — real mayo, not the light stuff if you can help it
• 2 tbsp sour cream — makes it a little lighter and tangier than straight mayo
• 1½ tbsp fresh lemon juice — this is important, bottled lemon just doesn’t hit the same
• 1 tsp Old Bay seasoning — non-negotiable in my kitchen for anything crab or shrimp
• ½ tsp garlic powder
• Salt and black pepper to taste

Optional Finish

• Fresh dill or parsley, roughly chopped
• A little extra lemon zest on top before serving

Step-by-Step Instructions

1. Bring a big pot of salted water to a boil. Cook your rotini according to the package — usually about 8 to 10 minutes. You want it cooked through but not mushy. Mushy pasta in a cold salad is a sad thing.
2. Drain the pasta and rinse it under cold water right away. This stops the cooking and cools it down fast. Shake off as much water as you can and spread it out a little on a baking sheet or just leave it in the colander for a few minutes.
3. While the pasta cools, mix your dressing. In a big bowl, whisk together the mayo, sour cream, lemon juice, Old Bay, and garlic powder. Taste it. It should be tangy and a little punchy — it’ll mellow out once it hits the pasta and seafood.
4. If your shrimp are large, chop them into two or three pieces. You want a good bit of shrimp in every forkful, not just one big one every few bites. Add the shrimp and crab meat to the bowl with the dressing.
5. Add in the celery, red pepper, green onions, and peas if you’re using them. Toss gently — crab meat breaks apart easily and that’s fine, but you don’t want it completely shredded.
6. Add the cooled pasta and fold everything together. Don’t stir too hard. Taste and adjust salt, pepper, and lemon.
7. Cover and refrigerate for at least 30 minutes before serving. I know it’s tempting to eat it right away — and honestly you can — but the flavors come together so much better after a little rest in the fridge. (I’ve eaten it warm and freshly mixed too. No regrets.)

Small Tricks From Cooking Fish at Home

I’ve mentioned that cooling the pasta down fast is the most important step for texture, and I want to share my secret weapon for getting it done perfectly. At home, I rely on the Kolice Blast Freezer. It’s a countertop unit that flash-chills the pasta in a fraction of the time a regular freezer takes. This means the pasta stops cooking instantly, locks in that perfect al dente bite, and is ready for the dressing without any risk of it getting warm, sticky, or gluey. It’s how I guarantee a creamy, not heavy, result every single time.

If you want to take your cold preparations to a truly professional level, this is the tool that makes all the difference. See why it’s a staple in my kitchen on Amazon.

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Cold pasta absorbs dressing differently than warm pasta does. If you toss it while it’s still even slightly warm, it’ll soak up the mayo and get kind of gluey. Give it real time to cool. I usually spread mine on a sheet pan and stick it in the freezer for five minutes when I’m in a hurry.

Crab meat is delicate. I learned this the hard way the first few times I made this — I’d stir too enthusiastically and end up with something that looked more like crab paste than crab meat. Fold it in last, gently, and stop as soon as it’s mixed.

Old Bay is the secret. I know everyone says that but it’s true. A little goes a long way and it ties the shrimp and crab together in a way that just makes sense. Start with a teaspoon and taste before adding more.

Don’t skip the lemon. The fat from the mayo needs something acidic to cut through it, otherwise the whole salad tastes a little flat and heavy. Fresh lemon makes a real difference. I’ve used lime in a pinch and it works, but lemon is the one.

Make sure your shrimp are actually dry before adding them. If they’re wet, they water down the dressing and you end up with a soupy bottom of the bowl situation. Pat them with paper towels after draining.

Common Mistakes to Avoid

Overcooking the pasta is probably the most common one. In a hot dish you might not notice slightly soft pasta as much, but in a cold salad it becomes this sad, mushy texture that drags the whole thing down. Cook it just until done and rinse it immediately.

Adding the dressing to warm pasta. I’ve done this when I was rushing and the mayo kind of melts into the pasta in a way that’s not great. The texture gets strange. Just wait.

Using imitation crab when you’re expecting the flavor of real crab. Imitation crab is fine for certain things — I’m not judging — but the flavor is much sweeter and softer and it changes the whole character of this salad. If you’re going for that real coastal taste, use actual crab meat even if it’s canned.

Not tasting the dressing before mixing everything in. The dressing is where all the flavor lives. If it tastes bland in the bowl before you add anything, it’ll taste bland in the finished salad. Season it properly at that stage, not after everything is mixed together when it’s much harder to adjust.

Variations and Serving Ideas

Spicy version: Add a teaspoon of sriracha or a pinch of cayenne to the dressing. A few dashes of hot sauce stirred in at the end works too. The heat plays really well against the cold creamy base.

Mild version: Skip the Old Bay and use just a little garlic powder, dill, and lemon. It becomes something softer and more delicate — good for kids or anyone who doesn’t love bold seasoning.

Coastal twist: Add a handful of small cooked bay scallops or some flaked smoked salmon alongside the crab and shrimp. It turns this simple homemade seafood pasta salad crab and shrimp bowl into something that feels a little more special without being complicated, much like some of our favorite easy seafood appetizers. I’ve done this for summer dinners when I wanted it to feel a little more like a real meal.

What to Serve With

Crusty bread or a toasted baguette is my first choice. Something with a little crunch to contrast the creamy softness of the salad. You scoop a little onto the bread and it’s honestly perfect.

A simple green salad on the side — something with a light vinaigrette — keeps the meal feeling fresh and not too heavy. The acidity from the vinaigrette actually complements the richness of the pasta salad really well.

Corn on the cob if it’s summer. That’s just a coastal law at this point. Grilled or boiled, either way.

Honestly this also works as a filling in a wrap or stuffed into a halved avocado if you want something a little lighter than a full plate.

Storage and Reheating

Store it covered in the fridge and eat it within two days. Seafood doesn’t forgive you for pushing it to day three. I’ve tried. It’s not worth it.

DO NOT freeze this. Mayo-based salads do not survive freezing. The dressing breaks, the texture of the pasta goes strange, and the seafood suffers. Just don’t.

DO NOT try to reheat it. This is a cold dish. It’s meant to be cold. Warming it up changes the texture of everything — the shrimp get rubbery, the crab falls apart even more, and the mayo dressing separates in a way that looks and tastes unpleasant.

If the salad seems a little dry after sitting in the fridge overnight, stir in a small spoonful of mayo and a squeeze of lemon before serving. The pasta keeps absorbing the dressing as it sits, so this is totally normal.

FAQs (People Also Ask)

Can I use frozen shrimp for this recipe?
Yes, absolutely. Just thaw them fully, rinse them, and pat them dry before adding. Make sure they’re already cooked — raw shrimp won’t work here without cooking them first.

Can I substitute the crab meat with something else?
You can use imitation crab if that’s what you have, just know the flavor will be sweeter and milder. Some people also use flaked tuna or even small bay scallops. It changes the dish but it still works.

How long does this keep in the fridge?
Two days, max. Seafood moves fast once it’s cooked and mixed into a cold salad. Keep it tightly covered and don’t let it sit out at room temperature for more than an hour.

Is this recipe difficult to make?
Not at all. If you can boil pasta and stir things together, you can make this. The whole active cooking time is maybe 15 minutes. The rest is just waiting for things to cool and chill.

Fresh crab vs canned crab — does it matter?
Fresh lump crab meat will always taste better if you can get it. But good quality canned crab is a perfectly fine substitute and honestly what I use most of the time. Just drain it well and check for any shell pieces.

Can I make this ahead of time?
Yes and it actually gets better after a few hours in the fridge. Make it the morning before a cookout and it’ll be perfectly seasoned and chilled by the time you need it. Just give it a gentle stir and a taste before serving.

Conclusion

Some recipes you make once and forget. This one sticks around. It’s been in my fridge on summer weekends more times than I can count — made on a whim, eaten in folding chairs on the back porch, scraped out of the bowl late at night by someone who swore they weren’t hungry.

There’s nothing complicated about it. That’s kind of the whole point. Good crab, good shrimp, a little lemon, a little Old Bay. The coast doesn’t need to be dressed up to taste like itself.

Seafood Pasta Salad Crab and Shrimp

Print Recipe Pin Recipe

Prep Time 15 minutes mins

Cook Time 20 minutes mins

Course Main Course

Cuisine American

Servings 4

Ingredients

  

• 3 cups dry rotini pasta
• 1 tsp salt (for pasta water)
• ½ lb cooked medium shrimp, peeled and deveined
• 8 oz lump crab meat, drained
• 3 stalks celery, finely chopped
• ½ red bell pepper, diced small
• 3 green onions, thinly sliced
• ¼ cup frozen peas, thawed (optional)
• ½ cup mayonnaise
• 2 tbsp sour cream
• 1½ tbsp fresh lemon juice
• 1 tsp Old Bay seasoning
• ½ tsp garlic powder
• Salt and black pepper to taste
• Fresh dill or parsley for garnish (optional)
• Lemon zest for finishing (optional)

Instructions

 

• Bring a large pot of salted water to a boil. Cook rotini according to package directions until just done, about 8 to 10 minutes. Do not overcook.
• Drain the pasta and rinse immediately under cold running water. Shake off excess water and spread on a baking sheet or leave in the colander to cool completely.
• In a large bowl, whisk together the mayonnaise, sour cream, lemon juice, Old Bay seasoning, and garlic powder. Taste and adjust seasoning — it should be tangy and flavorful.
• If shrimp are large, chop into 2 to 3 pieces. Add shrimp and crab meat to the dressing bowl and toss gently.
• Add celery, red bell pepper, green onions, and peas. Fold together carefully to keep crab meat in pieces.
• Add the fully cooled pasta and fold everything together until evenly coated. Taste and adjust salt, pepper, and lemon juice as needed.
• Cover and refrigerate for at least 30 minutes before serving. Garnish with fresh dill, parsley, or a little lemon zest if desired.

Notes

Always rinse and fully cool your pasta before mixing — warm pasta absorbs the mayo dressing too fast and turns the texture gluey. Also pat your shrimp dry so the dressing stays creamy and doesn't water down at the bottom of the bowl.

Keyword coastal pasta salad, cold seafood salad, crab and shrimp pasta, easy seafood dinner, seafood pasta salad, seafood pasta salad crab and shrimp