Louisiana Shrimp and Sausage Pasta Bake (Cajun Comfort in One Dish)

I made this for the first time on a Wednesday night when I had half a bag of frozen shrimp, a link of smoked sausage from the back of the fridge, and absolutely zero energy to think about what to cook. I didn't expect much. I threw it together, slid it in the oven, and by the time my husband came home the whole apartment smelled like something I'd spent hours on. He walked in, looked at the bubbling dish on the counter, and said "when did you get good at Cajun food?" — which, honestly, felt like a win.

What I love about this bake is that it's not fussy. You cook everything in one skillet, toss it with pasta and a quick cream sauce, pour it into a baking dish, top it with cheese, and the oven does the rest. The Cajun seasoning does a lot of the heavy lifting — it brings that smoky, slightly spicy depth without you having to measure out six different spices. I use the McCormick Cajun seasoning from Walmart; it's cheap, consistent, and doesn't taste like pure salt the way some store brands do.

My husband requests this at least twice a month now. Saad picks around the shrimp (he's going through a phase) but loves the cheesy pasta underneath. I've made it for a dinner with friends and I've made it on a Tuesday when no one felt like cooking. If you're looking for another easy weeknight bake that reheats well, my Easy Baked Honey Dijon Chicken follows a similar low-effort, high-reward approach.

One thing to know going in: don't skip the step of undercooking your pasta slightly. I made that mistake the first time — cooked it all the way through before it went in the oven — and it came out soft and a little mushy. Al dente before baking means perfectly cooked after. It's one of those small details that makes a real difference.

Why You'll Love This Recipe

• One skillet, one baking dish: I do all my cooking in a single skillet before it goes into the oven, which means I'm not standing in front of a pile of pots afterward. The whole meal — protein, sauce, carbs — comes together in one dish. On nights when I'm tired, that matters more than almost anything else.

• The cream sauce is forgiving: I've made this when I was distracted, forgot to stir for a minute too long, added the cheese too fast — and it still came out fine. The sauce isn't delicate the way some cream sauces are. It holds up, it thickens nicely in the oven, and it doesn't break.

• It actually reheats well: A lot of creamy pasta dishes turn into a gluey mess the next day. This one reheats surprisingly well with a splash of water or broth stirred in. I've eaten it for lunch three days in a row and it was good every time.

• The shrimp and sausage combination works: The sausage is smoky and rich, the shrimp are sweet and quick-cooking. Together they give you two completely different textures in the same bite, and both soak up the Cajun-spiced cream sauce really well. I've tried it with just sausage when I was out of shrimp — it's good, but less interesting.

• You can make it ahead: Assemble the whole thing the night before, cover it with plastic wrap, and refrigerate it. The next day you pull it out, let it sit for 20 minutes on the counter while the oven preheats, and bake. I do this when I know the evening will be hectic — it's one less thing to think about.

Ingredients

• 12 oz pasta (penne or rigatoni — something with ridges holds the sauce better)
• ½ lb medium shrimp, peeled and deveined (frozen is fine, just thaw fully first)
• ½ lb smoked sausage, sliced into rounds
• 1 tablespoon Cajun seasoning (I use McCormick; adjust to taste)
• 2 tablespoons butter
• 1 small onion, diced
• 2 cloves garlic, minced
• 1½ cups heavy cream
• ½ cup chicken broth
• 1 cup shredded mozzarella cheese
• ½ cup grated Parmesan cheese
• Salt and pepper to taste
• Chopped parsley or green onions for garnish (optional)

Directions

1. Cook the pasta: Boil your pasta in generously salted water until just al dente — a minute less than the package says. Drain and set aside. It'll finish cooking in the oven, so pulling it a little early is the move here.
2. Brown the sausage and cook the shrimp: Melt butter in a large heavy skillet over medium heat. Add the sausage slices and cook for about 3-4 minutes until browned on both sides. Add the shrimp and half the Cajun seasoning, stir everything together, and cook just 2-3 minutes until the shrimp turn pink. Pull them off the heat immediately — they'll keep cooking if you leave them in the pan. Set aside.
3. Build the sauce: In the same skillet (don't wipe it out — there's flavor in those brown bits), sauté the diced onion over medium heat until softened, about 3 minutes. Add the garlic and stir for 1 minute. Pour in the heavy cream and chicken broth, bring to a gentle simmer, then stir in the mozzarella, Parmesan, and remaining Cajun seasoning. Cook until the cheese melts and the sauce thickens slightly, 2-3 minutes. Taste and season with salt and pepper.
4. Combine everything: Preheat your oven to 375°F (190°C). Add the cooked pasta, sausage, and shrimp into the skillet with the sauce and stir until everything is coated. Pour the whole mixture into a greased 9x13-inch baking dish. Sprinkle extra mozzarella or Parmesan on top if you want more of a cheese crust.
5. Bake: Bake for 20-25 minutes until the top is golden and the sauce is bubbling around the edges. Let it rest for 5 minutes before serving — the sauce tightens up a bit as it sits and it's much easier to scoop.
6. Serve: Garnish with chopped parsley or green onions and get it on the table while it's hot.

Tips for Success

• Pull the shrimp early: This is the one thing I stress about with this recipe. Shrimp go from perfect to rubbery in about 60 seconds, and they're going back into a hot oven after you cook them. I take mine off heat the moment the last bit of grey disappears — they'll finish in the bake. Overcooked shrimp are really hard to rescue once the dish is assembled.

• Don't skip the chicken broth: The original recipe I was working from used only heavy cream, and the first time I made my version I followed that. The sauce was very rich, almost too thick. Adding the chicken broth loosens it up just enough so it coats the pasta without sitting heavy. Half a cup makes a real difference.

• Taste your Cajun seasoning before adding: Some brands are very salty, some are mild, and some lean heavily on cayenne. I always taste mine before using a full tablespoon. If yours is salty, hold off on adding extra salt until the very end when you can taste the whole sauce together.

• Use room-temperature cheese: Cold cheese straight from the fridge clumps when it hits the hot sauce and doesn't melt evenly. I pull mine out about 15 minutes before I start cooking. It makes the sauce smoother and saves you from having to stir aggressively trying to break up the lumps.

• Let it rest before scooping: Five minutes out of the oven makes the difference between a sloppy scoop and a clean one. The sauce sets slightly as it cools just a little, and you get much better portions. I know it's hard to wait when it smells that good, but it's worth it.

Variations

• Use andouille sausage: If you can find andouille at your grocery store (I've seen it at Walmart and Trader Joe's), use it instead of regular smoked sausage. It's smokier, spicier, and more traditionally Cajun. My husband prefers it this way — he adds a splash of hot sauce on top too, which I don't fight him on.

• Add bell peppers and onion: In Louisiana cooking, bell pepper, onion, and celery are the holy trinity of the cuisine. I sometimes sauté a diced green pepper alongside the onion, and it adds color, texture, and a sweetness that balances the spice really nicely. This is probably the most worthwhile add-in.

• Panko breadcrumb topping: Mix about ¼ cup of panko breadcrumbs with a teaspoon of melted butter and sprinkle it over the cheese before baking. It gets golden and crispy on top and adds a crunch that makes the whole thing feel fancier. I do this when I'm making it for guests.

• Swap in pepper jack cheese: Replace the mozzarella with pepper jack for a sharper, spicier result. It melts well and the flavor is more pronounced. I'm not claiming this is traditional Louisiana cooking — it's not — but it's genuinely good and my husband prefers it to the mozzarella version.

• Make it with chicken instead of shrimp: If you're cooking for someone with a shellfish allergy (or a child who picks around the shrimp), diced chicken thighs work well here. Brown them in the butter before the sausage, cook through completely, then proceed as normal. The Cajun seasoning works just as well on chicken.

Serving and Storage

Serving

Serve it straight from the baking dish while it's hot and bubbling. A simple green salad alongside cuts through the richness nicely — my Easy Cobb Salad works really well here. Garlic bread is the other obvious pairing, and honestly it's there to scoop up the extra sauce from the bottom of the dish. In Pakistan we'd naturally reach for bread with a saucy bake like this; in the US my readers seem to prefer it on its own or with a side salad, both of which work.

Storage

Leftovers keep in an airtight container in the fridge for up to 3 days. When you reheat it, add a small splash of water or chicken broth before microwaving — it keeps the sauce from drying out. I reheat mine covered with a damp paper towel in the microwave for about 2 minutes, stirring halfway. You can freeze it, but the texture of the shrimp suffers after freezing and thawing. I'd rather eat it within a few days than freeze it.

Frequently Asked Questions

Can I use frozen shrimp?

Yes, frozen shrimp works fine — I use it most of the time. Just thaw them completely first by placing them in a colander under cold running water for about 5 minutes, then pat them dry before cooking. Wet shrimp steam instead of sear, and you lose the nice browning in the pan.

How spicy is this dish?

With 1 tablespoon of Cajun seasoning it's got a moderate kick — noticeable but not overwhelming. If you're cooking for kids or spice-sensitive eaters, start with 1½ teaspoons and taste the sauce before adding more. If you want more heat, a dash of hot sauce or a pinch of cayenne stirred into the cream sauce does the job.

Can I assemble this ahead of time?

Absolutely. Put the whole dish together, cover it tightly with plastic wrap or foil, and refrigerate for up to 24 hours. When you're ready to bake, let it sit on the counter for about 20 minutes while the oven preheats so it's not going in stone cold. You may need an extra 5 minutes of baking time if it's still cold in the center.

What pasta shape works best?

Penne and rigatoni are my go-to choices because the ridges and hollow centers hold onto the cream sauce really well. Rotini works too. I'd avoid spaghetti or linguine for a bake like this — long pasta doesn't hold up as well when it's mixed, sauced, and baked all at once.

Can I make this without heavy cream?

Half-and-half works as a substitute, though the sauce will be a bit thinner. I wouldn't use regular milk — it tends to separate when you add cheese and simmer it. If you want to lighten it up slightly, half-and-half plus an extra tablespoon of Parmesan to help thicken the sauce is a reasonable swap.

This bake has become one of those recipes I come back to when I need something that feels substantial without requiring a lot of thought. The Cajun seasoning does most of the flavor work, the oven does most of the cooking, and somehow what comes out feels like more effort than it actually was. That's the kind of recipe I want in my rotation.

I'm not pretending this is an authentic Louisiana dish — I'm a Pakistani home cook in a regular kitchen, not a chef from New Orleans. But the bones of the recipe are sound, and the flavors are genuinely good. I've tweaked the ratios across several batches to get the sauce to the right consistency, and I think this version is the one I'll keep making. My husband hasn't complained once, which around here is as good as a standing ovation.

If you want something lighter on the side, my One Pan Lemon Garlic Salmon and Asparagus is a completely different direction — fresh, bright, done in 25 minutes — and it's a good weeknight contrast to a rich bake like this one. Rotate them and you've got two solid dinners covered. 🥄✨

If you made this and want more weeknight dinner ideas, here are a few others I keep coming back to:

• Easy Baked Honey Dijon Chicken — another oven bake that's low-effort and big on flavor
• One Pan Lemon Garlic Salmon and Asparagus — when you want something lighter and done fast
• Easy Cobb Salad Meal Prep — a great side or standalone lunch alongside leftovers from this bake
• Cheesy Cream Cheese Corn Casserole — a Southern-style side dish that would sit beautifully next to this pasta
• Easy Cobb Salad