Creamy Cajun Shrimp Pasta Bake

This Creamy Cajun Shrimp Pasta Bake is the ultimate comfort-food dinner for anyone who loves bold seasoning, tender shrimp, and bubbling melted cheese. Penne or rigatoni is coated in a rich Cajun cream sauce with garlic, onion, tomatoes, Parmesan, and mozzarella, then baked until golden and irresistibly creamy. It is hearty enough for a family dinner and special enough for a weekend gathering.

Prep Time 20 minutes

Cook Time 30 minutes

Total Time 50 minutes

Servings 6 servings

Ingredients

The Main Ingredients

14 oz (400g) penne or rigatoni pasta

1 lb (450g) large shrimp, peeled and deveined

1 cup whole cherry tomatoes

The Cajun Cream Sauce & Cheeses

2 tablespoons butter

2 tablespoons olive oil

3–4 cloves garlic, finely minced

1 small yellow or white onion, diced

1 cup heavy cream

¾ cup milk or chicken broth

1½ cups shredded mozzarella cheese, divided

½ cup finely grated Parmesan cheese

The Seasonings & Garnish

2 tablespoons Cajun seasoning, divided

1 teaspoon smoked paprika

Salt and black pepper, to taste

Fresh parsley, finely chopped

Instructions

Cook the Pasta

Bring a large pot of salted water to a boil. Cook the penne or rigatoni according to the package directions until just al dente. Avoid cooking the pasta until completely tender because it will continue cooking in the oven.

Before draining, reserve about ½ cup of the pasta water. Drain the pasta and set it aside.

Season the Shrimp

Pat the shrimp dry with paper towels. Place them in a bowl and toss with 1 tablespoon of Cajun seasoning, along with a little black pepper and smoked paprika.

Make sure the shrimp are evenly coated. Dry shrimp will sear more effectively and develop better flavor.

Sear the Shrimp

Heat the olive oil in a large oven-safe skillet over medium-high heat. Add the seasoned shrimp in a single layer.

Cook for approximately 1–2 minutes per side, just until the shrimp begin to turn pink and opaque. Do not fully cook them at this stage because they will finish cooking in the oven.

Transfer the shrimp to a plate and set aside.

Sauté the Aromatics

Reduce the heat to medium and add the butter to the same skillet. Once melted, add the diced onion and cook for approximately 3–4 minutes, until softened and translucent.

Add the minced garlic and cook for another 30–60 seconds, stirring frequently. The garlic should become fragrant without turning brown.

Make the Cajun Cream Sauce

Pour the heavy cream and milk or chicken broth into the skillet. Add the remaining tablespoon of Cajun seasoning and the smoked paprika.

Stir well, scraping the bottom of the skillet to incorporate the flavorful browned bits left behind by the shrimp.

Bring the sauce to a gentle simmer. Allow it to cook for approximately 3–5 minutes, stirring occasionally, until it begins to thicken slightly.

Add the Cheese

Reduce the heat to low. Stir in the Parmesan cheese and half of the shredded mozzarella.

Continue stirring until the cheeses melt into the sauce and create a creamy, smooth consistency.

Taste the sauce and adjust the salt and black pepper as needed. Cajun seasoning can already contain salt, so season gradually.

If the sauce seems too thick, add a splash of reserved pasta water or additional milk or broth.

Combine the Pasta and Tomatoes

Add the cooked pasta and whole cherry tomatoes to the skillet. Toss everything gently until the pasta is completely coated in the Cajun cream sauce.

The tomatoes will soften and become juicy as the casserole bakes, adding a bright contrast to the rich sauce.

Add the Shrimp

Return the seared shrimp to the skillet and gently fold them through the pasta. Distribute them evenly so every serving gets plenty of shrimp.

If your skillet is not oven-safe, transfer the mixture to a lightly greased baking dish.

Top with Mozzarella

Spread the pasta mixture into an even layer. Sprinkle the remaining mozzarella over the top, making sure it covers the surface generously.

The cheese will melt into a bubbly golden topping as the pasta bake cooks.

Bake Until Golden

Preheat the oven to 375°F (190°C). Bake the pasta for approximately 15–20 minutes, until the sauce is bubbling around the edges and the mozzarella is melted and lightly golden.

For an extra-golden top, switch the oven to broil for the final 1–2 minutes, watching carefully so the cheese does not burn.

Rest and Garnish

Remove the pasta bake from the oven and let it rest for approximately 5 minutes. This gives the sauce time to settle and makes serving easier.

Finish with freshly chopped parsley and serve warm.

Tips

Do Not Overcook the Pasta

Cook the pasta just until al dente. Overcooked pasta can become soft and mushy after spending additional time in the oven.

Pat the Shrimp Dry

Removing excess moisture helps the shrimp sear instead of releasing water into the skillet. This also helps the Cajun seasoning adhere more effectively.

Avoid Overcooking the Shrimp

Shrimp cook quickly. A short sear followed by baking is enough to finish them. Overcooked shrimp can become rubbery and dry.

Use an Oven-Safe Skillet

A large oven-safe skillet makes this recipe especially convenient because the sauce, pasta, shrimp, and cheese can all be prepared in one pan.

Keep the Sauce Slightly Loose

The sauce should look creamy and slightly more fluid before baking than you want in the finished dish. The pasta absorbs some of the sauce while baking.

Watch the Cajun Seasoning

Different Cajun seasoning blends have different levels of salt and heat. Taste the sauce before adding extra salt.

Reserve Pasta Water

The starchy pasta water is excellent for loosening the sauce if it becomes too thick. Add it a tablespoon or two at a time.

Use Freshly Grated Parmesan

Freshly grated Parmesan generally melts more smoothly and gives the sauce a richer savory flavor.

Don’t Overcrowd the Shrimp

If your skillet is small, sear the shrimp in batches. A crowded pan can cause the shrimp to steam rather than brown.

Let the Bake Rest

Resting for a few minutes after baking helps the sauce thicken slightly while keeping the pasta creamy and easy to serve.

Variations

Extra Spicy Cajun Shrimp Bake

Add crushed red pepper flakes or a pinch of cayenne pepper to the sauce for additional heat. You can also use a hotter Cajun seasoning blend.

Creamy Garlic Version

Increase the garlic to 5–6 cloves for a stronger garlic flavor. A small amount of fresh parsley stirred into the sauce also works beautifully.

Spinach Cajun Pasta Bake

Add several handfuls of fresh baby spinach when the cream sauce is simmering. Allow it to wilt before adding the pasta.

Bell Pepper Version

Add diced red, yellow, or green bell pepper with the onion. The peppers provide sweetness, color, and extra texture.

Chicken and Shrimp Bake

Replace part of the shrimp with diced cooked chicken for a hearty surf-and-turf-style pasta bake.

Sausage Cajun Pasta

Add sliced smoked sausage or andouille-style sausage for a smoky, savory variation. Brown the sausage before preparing the sauce.

Extra Cheesy Bake

Add a little Monterey Jack or provolone along with the mozzarella for an even creamier, more indulgent topping.

Tomato-Rich Version

Add a small amount of tomato paste to the sauce for deeper color and a subtle tomato flavor that complements the cherry tomatoes.

Lighter Version

Use half-and-half instead of heavy cream and reduce the amount of cheese slightly. The finished bake will be lighter while still maintaining a creamy texture.

Q&A

Can I use frozen shrimp?

Yes. Thaw the shrimp completely and pat them very dry before seasoning and cooking. This helps prevent excess water from entering the skillet.

Can I use another type of pasta?

Absolutely. Fusilli, ziti, shells, rigatoni, and other sturdy pasta shapes work well because they hold the creamy sauce.

Can I make this without heavy cream?

Yes. Half-and-half can be used for a lighter sauce. Milk can also work, although the sauce will be less rich and may require slightly more cheese for body.

Can I use pre-cooked shrimp?

You can, but add them later in the process. Since they are already cooked, they only need to warm through. Adding them too early can make them rubbery.

Why is my pasta bake dry?

The pasta may have absorbed more sauce than expected, or the sauce may have been reduced too much before baking. Add a little reserved pasta water, milk, or broth to loosen the mixture before it goes into the oven.

Can I prepare this ahead of time?

Yes. Assemble the pasta bake, cover it, and refrigerate it until ready to bake. If baking directly from the refrigerator, it may require additional time to heat completely.

Can I freeze Cajun shrimp pasta bake?

It can be frozen, although creamy sauces may change texture slightly after freezing and thawing. For best results, enjoy it fresh or refrigerate leftovers for short-term storage.

What can I serve with this pasta bake?

A crisp green salad, roasted vegetables, garlic bread, or steamed broccoli makes a great accompaniment.

How do I make it less spicy?

Use a mild Cajun seasoning and reduce the amount slightly. You can also balance the spice with additional cream, cheese, or a little extra pasta.

Nutrition

Approximate nutrition per serving, assuming 6 servings and excluding side dishes:

Calories: approximately 650–720

Protein: approximately 35–40g

Carbohydrates: approximately 55–65g

Fat: approximately 32–38g

Saturated Fat: approximately 16–20g

Fiber: approximately 3–4g

Sugar: approximately 5–7g

Sodium: approximately 850–1,100mg

Nutrition will vary depending on the pasta, shrimp size, cheese, Cajun seasoning, cream, and other brands used.

Conclusion

This Creamy Cajun Shrimp Pasta Bake is everything a comforting baked pasta should be: creamy, cheesy, spicy, savory, and loaded with tender shrimp. The Cajun cream sauce coats every piece of pasta, while juicy cherry tomatoes add freshness and melted mozzarella creates a golden finish. It is an easy crowd-pleasing dinner that brings bold Cajun-inspired flavor to the table with minimal fuss.