Seafood Pasta Salad with Shrimp and Crab
- Time: 20 min active + 10 min cooking + 2 hours chilling
- Flavor & Texture: Zesty, creamy, and crunchy
- Perfect for: Potlucks or meal prep
Table of Contents
Lump crab is the hero of this dish. It provides those big, tender chunks that make the whole thing feel high-end. Using a cheaper filler like imitation crab changes the experience, as you lose that distinct sweetness and the succulent texture of real crab.
This creamy seafood pasta salad is a great way to bring something fresh to the table. It's a simple seafood pasta salad with mayonnaise and lemon that cuts through the richness of the shrimp.
You can expect a seafood pasta salad with shrimp and crab that feels light but filling. It's basically the ideal summer side since it's served cold and takes very little active effort.
What Makes the Texture Work
- Pasta Timing: Cooking the pasta 1-2 minutes under the package directions stops it from becoming mushy after it sits in the dressing.
- The Folding Step: Gently folding in the lump crab instead of stirring prevents the delicate pieces from shredding into tiny bits.
- Temperature Control: Rinsing the pasta in cold water immediately stops the carryover heat, which keeps the noodles firm and the dressing cold.
Quick Recipe Specs
This recipe makes 12 servings. The total time is 2 hours 30 mins, but most of that is just waiting for the flavors to meld in the fridge.
Precision Checkpoints:
- Pasta: Cook 1-2 mins less than the box says.
- Chilling: Minimum 2 hours in the fridge.
- Safety: Keep the dish refrigerated at or below 40°F (4°C).
Ingredients and Swaps
- 16 oz (450g) fusilli or rotini pasta
- 1 lb (450g) chilled, cooked shrimp (peeled and deveined)
- 8 oz (225g) lump crabmeat
- 1/2 cup (60g) finely diced celery
- 1/4 cup (40g) minced red onion
- 1/4 cup (15g) finely chopped fresh dill
- 1 cup (230g) mayonnaise
- 1/4 cup (60ml) fresh lemon juice
- 2 tbsp (30g) Dijon mustard
- 1 tsp (5g) Old Bay seasoning
- 1/2 tsp (3g) kosher salt
- 1/4 tsp (1g) ground black pepper
This recipe centers on chilled shrimp and lump crab. If lump crab is unavailable, imitation crab is a common substitute, although it is more processed and saltier.
What Each Ingredient Does
| Component | Purpose | Substitute Notes |
|---|---|---|
| Rotini Pasta | Holds the sauce in spirals | gluten-free pasta works but absorbs more dressing |
| Lemon Juice | Cuts the fat of the mayo | Lime juice adds a tropical twist |
| Old Bay | Adds savory, briny depth | Use a mix of paprika and celery salt |
| Fresh Dill | Provides a bright, herbal finish | Parsley is a milder option |
Honestly, don't bother with low-fat mayonnaise here. The fat is what carries the flavor of the Old Bay and lemon, so sticking with the full-fat version is the way to go.
Essential Gear
You only need a few basics for this one. A large pot for the pasta, a colander for rinsing, and a medium bowl for the dressing. A large mixing bowl is a must for the final assembly so you have room to fold in the seafood without crushing it.
Step-by-step Instructions
How do I cook the pasta properly?
- Start a rolling boil in a large pot of salted water.
- Add the 16 oz pasta and cook for 1-2 minutes less than the package instructions until it is firm to the bite.
- Strain the pasta through a colander and rinse immediately with cold water until the noodles feel chilled to stop the cooking process.
How do I whisk the sauce?
- Using a medium bowl, whisk together the 1 cup mayonnaise, 1/4 cup lemon juice, 2 tbsp Dijon mustard, and 1 tsp Old Bay seasoning until the sauce is smooth and velvety.
- Stir in the 1/4 cup chopped dill, 1/2 tsp salt, and 1/4 tsp black pepper.
How do I combine everything?
- Mix the chilled pasta, 1/2 cup diced celery, and 1/4 cup minced red onion in a large mixing bowl.
- Pour the dressing over the mixture and toss until every spiral is coated.
- Fold in the 1 lb shrimp and 8 oz lump crabmeat. Using a rubber spatula, gently incorporate the seafood until evenly distributed. Note: Be gentle here so you don't break the crab lumps.
- Cover and refrigerate for at least 2 hours before serving to let the flavors meld.
Quick Fixes
If the pasta seems to have soaked up all the sauce after chilling, it's usually because the noodles were a bit too porous or sat too long. A quick stir with a squeeze of extra lemon or a dollop of mayo brings the creaminess back.
When the seafood doesn't seem to stick, it's often because the pasta wasn't chilled enough before mixing. The sauce should cling to the cold noodles and the seafood.
| Problem | Fix |
|---|---|
| Pasta is too dry | Stir in 1 tbsp mayo or lemon juice |
| Crab is shredded | Use a rubber spatula and fold gently |
| Sauce is too thick | Add a teaspoon of water or lemon juice |
Dietary Adaptations
If you want an Italian seafood pasta salad, swap the Old Bay and dill for dried oregano and fresh basil. You can also replace the mayonnaise with a high-quality Italian dressing for a vinegary, oil-based version.
For a low-mayo version, use half mayo and half Greek yogurt. It adds a bit of tang and reduces the fat, though it's slightly less rich. If you're serving this with a side, a homemade Caesar salad is a great pairing.
For a gluten-free adaptation, use brown rice or corn-based rotini. Just keep in mind that these pastas can get mushy faster, so be even more aggressive with the under-cooking step.
Storing Leftovers
Keep this seafood pasta salad in a sealed tub in the fridge. It stays fresh for 3 to 5 days. If the colors look a bit dull after a couple of days, stir in a teaspoon of lemon juice to brighten it back up.
Do not freeze this dish. The mayonnaise will separate during the thawing process, and the shrimp and crab will turn rubbery.
Serving Suggestions
This is best served in a chilled bowl to keep the seafood safe and refreshing. I like to garnish it with extra sprigs of fresh dill or a few slices of lemon on the side for an extra pop of acidity. It works great as a main lunch or a side dish for grilled fish.
Good to Know
How do I prepare the pasta?
Cook the pasta for 1-2 minutes less than the package directions to keep it firm. Rinse it under cold water immediately after draining to stop the cooking process.
Does this salad use mayonnaise?
Yes, the base consists of one cup of mayonnaise. This provides the creamy texture that binds the seafood and vegetables together.
What creates the flavor in the dressing?
The flavor comes from a mix of lemon juice, Dijon mustard, and Old Bay seasoning. Fresh dill adds a herbal brightness to the finish.
How to combine the seafood?
Using a silicone spatula, lightly incorporate the shrimp and lump crabmeat into the mixture. This method spreads the seafood evenly and prevents the crab from breaking apart.
Can I omit the vegetables?
Yes, you can leave out the celery and red onion. The salad will remain creamy and flavorful thanks to the seasoned mayonnaise dressing.
How long does it keep?
Keep the salad in a sealed tub in the fridge. It stays fresh for 3 to 5 days.
Why should the dish be chilled first?
Refrigerating the salad for 2 hours allows the flavors to meld. This step ensures the pasta is thoroughly infused with the dressing before serving.
Could other pasta shapes work?
Rotini or fusilli are ideal because their spirals hold the dressing well. If you enjoy making chilled sides, you might also like a classic Caesar salad.