Cozy Weeknight Comfort: Seafood Casserole Recipe Magic

If you’ve been looking for a cozy, no-fuss dish that feels like a warm hug at the end of a long day — this seafood casserole recipe might just be your new best friend. Whether you’re juggling work deadlines, carpool chaos, or just trying to avoid another round of “What’s for dinner?”, this hearty, creamy casserole has you covered.

Hey there, I’m Grace — a food lover, mom, and firm believer that dinner doesn’t have to be complicated to be downright delicious. I started 30-Min Recipes for people like you and me: busy women (and some brave fellas!) who want real food on the table without a 10-step soufflé situation.

And let me tell you, when I first whipped up this seafood casserole on a chilly Tuesday evening, my kids — who usually treat seafood like it’s an alien species — dove in like it was mac and cheese. That’s when I knew it was a keeper.

So, if you’re craving something rich, savory, and just a little bit fancy without the fuss, this casserole is calling your name. Plus, it’s a great way to sneak some seafood into your weeknight routine without the intimidation of cooking fish from scratch.

Why You’ll Love This Seafood Casserole Recipe

Besides being straight-up delicious (seriously, my neighbor now calls it “The Shrimp Thing You Made” like it’s a legend), this casserole is:

• Perfect for busy weeknights: With cooked shrimp and prepped crab, this comes together faster than most casseroles.
• Freezer-friendly: Make it ahead and freeze for future you — the one who forgot to meal prep again.
• Kid-approved: It’s creamy, savory, and topped with crunchy breadcrumbs — what’s not to love?
• Customizable: Don’t like mushrooms? Leave ‘em out. Want to toss in scallops or tilapia? Go wild!

And let’s be honest — casseroles have a nostalgic charm, don’t they? This dish tastes like something your grandma would’ve proudly pulled out of the oven, but with an easier, modern twist.

Ingredients: What You’ll Need

Here’s everything that goes into this comforting seafood casserole recipe. You probably already have most of it hanging out in your pantry or freezer.

• 1 box long grain and wild rice mix (or just long grain rice — both work!)
• 1½ cups crabmeat (canned or thawed frozen)
• 1½ cups cooked shrimp (peeled, deveined, and chopped if large)
• 1 cup chopped celery
• 1 medium onion, chopped
• ½ cup chopped green pepper
• 1 cup canned mushrooms, drained
• 1 jar (2 oz) pimientos, drained and chopped
• 1 cup mayonnaise
• ¾ cup milk (I use 2%, but any will do)
• 1 tsp Worcestershire sauce
• Salt & pepper, to taste
• 1 cup dry bread crumbs (for that crunchy topping)

Optional Swap Ideas:

• Swap crabmeat for imitation crab if you’re on a budget — still tasty!
• Use fresh mushrooms if you’ve got the time to sauté them.
• Add a little shredded cheddar on top if your crew loves cheesy goodness.

Step-by-Step Instructions (Made Simple!)

Let’s break it down in just three steps — because no one needs a complicated dinner at 6 PM, am I right?

Step 1: Cook the Rice

Start by preheating your oven to 375°F. Cook the rice according to package instructions. You want it nice and fluffy — not mushy. This will be the hearty base that soaks up all that seafood flavor.

Tip: Wild rice adds a gorgeous texture and nutty bite, but if you only have plain long grain rice, that’ll do just fine.

Step 2: Mix Up That Seafood Goodness

Grab a big mixing bowl — this is where the magic happens. Toss in your crab, shrimp, celery, onion, green pepper, mushrooms, and pimientos. Give it a gentle stir so the ingredients are evenly distributed.

In a smaller bowl, whisk together the mayonnaise, milk, Worcestershire sauce, and a dash of pepper. Once creamy and combined, pour that over the seafood mixture and stir again.

Now, fold in the cooked rice. It’s gonna look like a seafood party in a bowl, and yes, it smells amazing already.

Step 3: Bake Until Golden and Bubbly

Grease a 13×9-inch baking dish (I like to use a bit of butter or cooking spray) and pour the entire mixture in, spreading it out evenly.

Sprinkle those dry bread crumbs over the top for the perfect golden crunch. Pop it into the oven uncovered, and bake for 40 to 50 minutes, until it’s bubbling and golden on top.

Your kitchen will smell like a coastal bistro — I promise.

One time I forgot to set a timer and came back to a perfectly browned, slightly crispier top — turns out it’s pretty forgiving! Don’t stress too much about the timing. Just keep an eye toward the end, and when it’s golden and bubbly, you’re good to go.

How to Make This Seafood Casserole Recipe Even Better

Alright, friends — you’ve got the basics of this seafood casserole recipe down, but let’s take it from “pretty good” to dinner legend status. As someone who’s cooked her way through just about every seafood recipe you can imagine (yes, even the fancy squid ink seafood pasta recipe — more on that later), I’ve picked up a few tricks to make even the simplest casserole feel a little gourmet.

Grace’s Tips for Casserole Perfection

Use Fresh When You Can:
If you’ve got access to fresh seafood, go for it! But don’t stress — frozen shrimp and canned crab totally work here. Just make sure to drain and pat dry so your casserole doesn’t turn watery.

Season As You Go:
Give the mixture a quick taste before baking (no raw eggs here, so it’s safe!). Add a pinch of salt, a grind of pepper, or a little extra Worcestershire if needed. Think of it like building flavor in layers.

Want a Cheesier Take?
Add 1 cup of shredded cheddar or Monterey Jack to the seafood mix for a rich twist. Trust me, I’ve basically made this into a seafood mac and cheese recipe before — and the kids were obsessed.

Feeling Spicy?
A dash of Old Bay or even a little Cajun seasoning gives it a Southern flair. You could even drizzle a bit of Cajun seafood boil sauce on the side for a spicy, buttery kick.

Make It a Meal:
Serve with a simple green salad and crusty bread, or go all out with a side of garlicky green beans. You’ll have a full, satisfying meal — no need to make three side dishes (unless you want to, in which case… you’re a rockstar).

FAQs: Because I Know You’re Wondering…

You’re not alone — we all have those mid-cooking “Wait, can I…?” moments. So here are some quick answers to the most common questions I get about this cozy seafood casserole recipe.

Can I substitute canned crab for fresh?

Absolutely. While fresh crab is flakier and a little sweeter, canned crab (especially the lump kind) still works beautifully. Just be sure to drain it really well.

Can I make this ahead and freeze it?

Yes, yes, YES! This is one of my favorite seafood recipes to freeze. Assemble everything but the breadcrumbs, wrap tightly in foil, and freeze for up to 2 months. When ready to bake, thaw overnight and add the breadcrumbs just before baking.

I’m out of mayo — what can I use instead?

You can use sour cream or even plain Greek yogurt, but keep in mind, they won’t have quite the same richness or heat tolerance. Mayo just holds up beautifully in the oven. That said, I once swapped in half sour cream and no one noticed.

Can I add more spice?

Yes ma’am. Stir in a teaspoon of your favorite seafood boil seasoning, or drizzle a little Cajun seafood boil sauce recipe over your plate. It’s also great with hot sauce or crushed red pepper for a little kick.

Can I add lobster or scallops?

Ooh, fancy! Yes — this recipe is super flexible. You can sub in chunks of lobster tail, bay scallops, or even salmon if you want to get creative. I once added lobster and shrimp together for a holiday version and… wow.

Love Seafood Recipes? Here’s What to Try Next

If you’re anything like me and you’re riding that seafood recipe high, don’t stop at this casserole. Here are a few more ideas to explore:

• Seafood Stuffing Recipe: Think Thanksgiving, but make it coastal. Shrimp, crab, cornbread — it’s a Southern dream.
• Cajun Seafood Boil Sauce Recipe: Butter, garlic, lemon, and spice. This sauce is liquid gold for boils or drizzled over grilled shrimp.
• Seafood Boil Seasoning Recipe: Make your own spice blend at home! It’s way better than store-bought and totally customizable.
• Squid Ink Seafood Pasta Recipe: When you want to impress. This one’s moody, dramatic, and surprisingly easy. Pairs perfectly with wine and candlelight.
• Seafood Mac and Cheese Recipe: Creamy, cheesy, and loaded with shrimp and crab. Comfort food with a seaside twist.

Psst! You can find more of these on my blog under the Seafood Recipes — your new happy place for all things deliciously ocean-inspired.

Grace’s Final Thoughts on the Seafood Casserole Recipe

I’m not kidding when I say this seafood casserole recipe has become a staple in my kitchen — and not just because it tastes like it took hours (spoiler: it didn’t). It’s the kind of recipe that feels comforting and cozy, but still a little elevated. You know… like yoga pants that look like slacks? That’s this dish.

Every time I make it, I’m reminded that seafood doesn’t have to be reserved for date nights or dinner parties. Nope — it can be weeknight easy, freezer-friendly, and yes, even picky-eater approved.

Whether you’re already a pro at seafood recipes or you’re dipping your toes into the water (see what I did there?), this casserole is such a warm and welcoming way to start. It’s flexible, family-friendly, and secretly kind of fancy. Honestly, it’s giving major “I tried, but not too hard” energy — and we love that around here.

One More Thing, Friend…

If you try this and your family raves about it? Please tell me. Shoot me a message or leave a comment on the blog — I live for that kind of thing. Seriously, nothing makes my day like hearing someone finally got their picky teen to eat shrimp.

And hey, if you find yourself hooked on seafood (pun 100% intended), I’ve got so much more for you:

Try my seafood boil seasoning recipe for your next backyard feast.
Or dive into the ooey-gooey deliciousness of my seafood mac and cheese recipe — comfort food at its finest.
Want something bold and elegant? Bookmark that squid ink seafood pasta recipe for your next date night in.

The world of seafood recipes is way bigger (and easier!) than we often think — and you don’t need a culinary degree to enjoy every bite. All you need is 30 minutes, a little love, and maybe a glass of wine to sip while it bakes.

So Go Ahead, Make It Tonight

If your evening needs a little warmth, a little flavor, and a whole lot of comfort, this seafood casserole recipe is the answer. It’s the kind of meal that brings people to the table and keeps them there — lingering, laughing, maybe even going back for seconds (or thirds… no judgment).

You’ve got this, friend. Whether you’re a seasoned home cook or someone still figuring out where the measuring cups are, I promise: this recipe is 100% doable. And delicious.

From my kitchen to yours —
Grace 💛

Keep Cooking with Me!

If this seafood casserole recipe brought a little joy to your table tonight, don’t stop there! I’ve got a whole lineup of quick, cozy, and downright delicious dishes waiting for you. Whether you’re craving something hearty, sweet, meaty, or meatless, there’s a recipe here with your name on it.

More Recipes You’ll Love from My Kitchen:

The Best Way to Cook Instant Pot BBQ Chicken
Perfect for busy nights when you need something satisfying and saucy in a flash. It’s my go-to when I don’t want to touch the oven.

Lamb Meatballs 101: Everything You Need
Tender, flavorful, and surprisingly easy. Great with rice, pasta, or tucked into a pita for a Mediterranean twist.

Vegan Christmas Cookies Everyone Will Love
You don’t need dairy to bring the holiday magic! These cookies are festive, easy, and picky-eater approved — even when it’s not Christmas.

Vegan Bread Recipe for Busy Days
Soft, delicious, and no kneading required. Seriously, if you’ve got 10 minutes and a mixing bowl, you can make this bread.

How to Make Venison Breakfast Sausage Recipe
A hearty, protein-packed start to your morning. If you’ve got ground venison, this one’s a must-try.

How to Make the Perfect Smoked Meatloaf Recipe
Smoky, savory, and a total flavor bomb. This one’s for my grill lovers and meatloaf skeptics alike.

How to Make Slutty Brownies Step-by-Step at Home
Three layers of decadent goodness — cookie dough, Oreos, brownies — need I say more? Make a batch, hide a square for yourself.

The Best Homemade Sloppy Joe Sauce Recipe
Way better than the canned stuff. This sauce turns any weeknight into a fun, flavorful dinner the whole family will cheer for.

Chicken Salad Recipes for Every Taste
Classic, spicy, fruity — however you like your chicken salad, I’ve got a recipe that’ll become your new lunch fave.

Still craving more seafood?
Don’t forget to explore my full Seafood Recipes Collection — from a spicy cajun seafood boil sauce recipe to comforting seafood mac and cheese, there’s something for every craving.

Thanks for cooking with me, friend. Until next time — stay cozy, stay curious, and never be afraid to try something new in the kitchen. You’ve got this.

Easy Seafood casserole recipe - 30minrecipes

Make a creamy and delicious Seafood casserole recipe in just 40 min! Perfect for weeknight dinners or special occasions. Easy packed with flavor.

Type: Main Course

Cuisine: American

Keywords: seafood recipes, seafood casserole recipe, seafood stuffing recipe, cajun seafood boil sauce recipe, seafood boil seasoning recipe, squid ink seafood pasta recipe, seafood mac and cheese recipe, weeknight dinners, casseroles, family dinner, freezer meals

Recipe Yield: 6 servings

Calories: Approx. 420 kcal per serving (optional but helpful for nutrition-conscious users)

Preparation Time: PT15M

Cooking Time: PT45M

Total Time: PT1H

Recipe Ingredients:

• 1 box long grain and wild rice mix (or just long grain rice)
• 1½ cups crabmeat (canned or thawed frozen)
• 1½ cups cooked shrimp (peeled, deveined, chopped if large)
• 1 cup chopped celery
• 1 medium onion, chopped
• ½ cup chopped green pepper
• 1 cup canned mushrooms, drained
• 1 jar (2 oz) pimientos, drained and chopped
• 1 cup mayonnaise
• ¾ cup milk (2% recommended)
• 1 tsp Worcestershire sauce
• Salt & pepper to taste
• 1 cup dry bread crumbs

Recipe Instructions: Cook the Rice Preheat oven to 375°F. Cook rice according to package instructions until fluffy and tender. Mix Ingredients In a large bowl, combine crab, shrimp, celery, onion, green pepper, mushrooms, and pimientos. In a separate bowl, whisk together mayonnaise, milk, Worcestershire sauce, salt, and pepper. Add this mixture to the seafood bowl. Stir in the cooked rice. Assemble and Bake Transfer everything into a greased 13×9-inch baking dish. Top with dry bread crumbs. Bake uncovered for 40–50 minutes, until golden brown and bubbly.

Editor's Rating:
4.9