The aroma of a bubbling casserole can start a little dance in my kitchen, and this Cajun Shrimp and Crab Mac and Cheese takes that experience to a whole new level! Combining the warmth of creamy cheese with tender shrimp and succulent crab, this recipe redefines comfort food in the most delicious way. Not only is it a crowd-pleaser for gatherings, but it also allows you to customize the spice levels according to your taste—whether you love a kick of heat or prefer a milder flavor. Plus, it’s perfect for meal prep, making weeknight dinners a breeze. Curious how to create this seafood delight? Let’s dive into the recipe!

Why is this recipe a must-try?
Flavorful, the rich combination of Cajun spices and creamy cheeses elevates mac and cheese to a whole new level. Customizable, you can easily swap crab types or adjust the heat to suit your palate, whether you’re using fresh or imitation crab. Quick prep, even busy weeknights can accommodate this satisfying dish with minimal effort. Crowd-pleaser, everyone will want seconds when this decadent casserole graces the table, making it ideal for gatherings. Plus, versatile, consider pairing with a refreshing Salad Bacon Cheese for a complete meal!
Shrimp and Crab Mac and Cheese Ingredients
For the Pasta
• 3 cups elbow macaroni – This is the structural base of your dish; feel free to use any pasta shape you love!
For the Seafood
• 2 lbs fresh crab legs or 2.5 cups imitation crab meat – Fresh crab brings a delicate flavor, but imitation is budget-friendly without sacrificing substance.
• 2 pounds shrimp, peeled and deveined – Adds wonderful protein and flavor; you can mix in other seafood like lobster or scallops if desired.
For the Cheesy Mixture
• 4 cups sharp cheddar cheese, grated – The star of your cheesy blend for incredible meltiness; any melting cheese can work as a substitute.
• 2 cups mild cheddar cheese, grated – This adds creaminess; replace with your favorite cheeses if necessary.
• 2 cups colby & Monterey Jack cheese, grated – These enhance the creamy texture; similar cheeses can be swapped in.
• 1/2 cup Parmesan cheese, grated – Provides that delightful umami punch; consider pecorino for a bolder flavor.
• 2 large eggs, beaten – Helps bind everything together; can be omitted for a delicious egg-free version.
For the Dairy
• 1 cup whole milk – Adds the perfect creaminess to the dish; low-fat milk can be a lighter alternative.
• 2 – 2.67 cups evaporated milk – Enhances creaminess; adjust based on your desired richness.
For the Seasoning
• 1/4 cup fresh or dried basil – Offers lovely herby notes; fresh is best, but dried will do in a pinch!
• 1/2 – 1 teaspoon paprika – Adds mild flavor and beautiful color; adjust to your spice preference.
• 1/4 – 1/2 teaspoon cayenne pepper – Gives that spicy kick; use less for milder taste preferences.
• 1/2 teaspoon salt – Essential for enhancing all the flavors; feel free to adjust to your liking.
• 1/2 teaspoon black pepper – Integrates warmth and depth; you can modify to your flavor intensity.
For Cooking
• 2 tablespoons olive oil – Essential for sautéing shrimp; feel free to use butter or another cooking oil.
• Pinch of salt and pepper – To season shrimp nicely while cooking.
For Topping
• Cajun seasoning for topping – Elevates the overall flavor profile; swap with your preferred spice blend as needed.
Step‑by‑Step Instructions for Shrimp and Crab Mac and Cheese
Step 1: Prepare Your Ingredients
Before diving into the cooking process, gather all your ingredients for the Shrimp and Crab Mac and Cheese. This includes measuring out cheeses, seafood, and spices, and chopping fresh basil if using. Organizing your workspace will help streamline your cooking and ensure nothing is forgotten as you craft this creamy delight.
Step 2: Cook the Shrimp
In a large skillet, heat 2 tablespoons of olive oil over medium heat. Once hot, season the peeled and deveined shrimp with a pinch of salt, pepper, and a sprinkle of Cajun seasoning. Sauté the shrimp for about 4-6 minutes until they turn pink and opaque, stirring occasionally. Once cooked, remove them from the skillet and set aside to retain their flavorful juiciness.
Step 3: Preheat Your Oven
Preheat your oven to 350°F (177°C) and grease a 9×13-inch baking dish with butter or cooking spray. This ensures that the Shrimp and Crab Mac and Cheese won’t stick while baking, allowing for a beautifully golden crust on top and easy serving later.
Step 4: Cook the Pasta
In a large pot, bring salted water to a boil and add 3 cups of elbow macaroni. Cook the pasta until al dente, following package instructions (usually about 8-10 minutes). Once cooked, drain the pasta and transfer it to a large bowl, ready to be combined with the seafood and flavorful ingredients.
Step 5: Combine the Pasta and Seafood
To the bowl with the macaroni, add the cooked shrimp, crab meat, and basil. Toss everything together gently to distribute the seafood and herbs throughout the pasta, ensuring each bite of your Shrimp and Crab Mac and Cheese bursts with flavor and texture.
Step 6: Whisk Together the Dairy Mixture
In a separate bowl, whisk together 1 cup of whole milk, 2 to 2.67 cups of evaporated milk, the spices, and 2 beaten eggs until smooth. Taste the mixture to adjust seasoning as needed before combining it with the macaroni mixture. This creates the creamy, cheesy base that makes this dish so indulgent.
Step 7: Mix in the Cheeses
Add the majority of the grated cheeses to the pasta and seafood mixture. Stir thoroughly until you achieve a creamy consistency, and then pour this mixture into your prepared baking dish. The melted cheeses will bind everything together when baked, resulting in that irresistible gooey texture.
Step 8: Add Toppings
Sprinkle the remaining grated cheeses on top of your assembled Shrimp and Crab Mac and Cheese. Finish with a dusting of additional Cajun seasoning or any preferred spices for an extra layer of flavor. This step not only adds deliciousness but also creates a beautiful golden crust while baking.
Step 9: Bake the Casserole
Place your prepared baking dish in the oven and bake for 45-55 minutes, or until the top is bubbly and golden brown. Keep an eye on it, and if it starts to brown too quickly, cover it loosely with aluminum foil to prevent burning while the inside continues to cook.
Step 10: Rest Before Serving
Once baked to perfection, remove your Shrimp and Crab Mac and Cheese from the oven and allow it to sit for 20-30 minutes. This rest period helps it firm up and makes serving easier, ensuring the layers hold together beautifully when you dig into this scrumptious seafood treat.

Variations & Substitutions for Shrimp and Crab Mac and Cheese
Feel free to get creative and make this dish uniquely yours, transforming it with simple swaps that will tantalize your taste buds.
- Seafood Swap: Try using lobster or scallops instead of crab for a luxurious seafood twist. The richness will elevate the entire dish!
- Cheese Variation: Substitute sharp cheddar with gouda for a smoky undertone, or mix in a creamy brie for a velvety melt that takes comfort food to new heights.
- Gluten-Free Option: Swap elbow macaroni for gluten-free pasta, so everyone can enjoy a satisfying meal without worry.
- Dairy-Free Delight: Use coconut milk and cashew cream to create a creamy base without dairy. Add nutritional yeast for a cheesy flavor!
- Spicy Kick: Increase cayenne to ramp up the heat, or add chopped jalapeños for a zesty burst in every bite. Perfect for heat lovers!
- Herbal Infusion: Fresh cilantro or parsley can be used instead of basil for a fresh flavor. They add a delightful brightness to the dish.
- Veggie Boost: Mix in steamed broccoli or sautéed spinach for added nutrients and a pop of color—a great way to sneak in some veggies!
- Topping Options: Instead of using extra cheese on top, consider a crispy panko breadcrumb topping mixed with herbs for a satisfying crunch.
Remember, the beauty of this Shrimp Crab Alfredo Mac and Cheese lies in its versatility—each variation can reflect your personal taste while creating a memorable meal!
Make Ahead Options
These Cajun Shrimp and Crab Mac and Cheese are perfect for meal prep, allowing you to enjoy this indulgent dish any night of the week! You can prepare the entire casserole up to 24 hours in advance by assembling it completely and then covering it well with plastic wrap. To maintain the creamy texture, refrigerate the unbaked casserole; this helps prevent dryness while it sits. When you’re ready to bake, simply pop it into a preheated oven for 15-20 minutes longer than the original baking time, until it’s bubbly and golden. This way, you’ll have a delicious, stress-free dinner waiting for you, just as comforting as if you made it in the moment!
How to Store and Freeze Shrimp and Crab Mac and Cheese
Fridge: Store any leftovers in an airtight container for up to 3 days. If you plan to enjoy it later, keep it covered to maintain moisture and flavor.
Freezer: For longer storage, freeze the Shrimp and Crab Mac and Cheese in a freezer-safe container for up to 2 months. Make sure to wrap it tightly to prevent freezer burn.
Reheating: To reheat, thaw overnight in the fridge if frozen, then warm in the oven at 350°F (177°C) for about 20-30 minutes until heated through. You can add a splash of milk to loosen it up.
Make-Ahead Tip: Prepare the dish in advance and refrigerate it unbaked for up to 24 hours before popping it in the oven. This way, you can enjoy a comforting seafood meal without the last-minute fuss!
Expert Tips for Shrimp and Crab Mac and Cheese
-
Taste as You Go: Before adding eggs to the milk mixture, taste it to ensure the seasoning is just right. Adjust spices according to your preference for the ultimate flavor boost.
-
Don’t Overcook Shrimp: For perfectly tender shrimp, sauté them just until they’re pink and opaque. Overcooking can make them rubbery, compromising the texture in your mac and cheese.
-
Rest for Perfect Texture: Allow the baked dish to rest for 20-30 minutes before serving. This waiting period ensures a creamy consistency and helps the layers stay intact when serving.
-
Mix up Your Seafood: This recipe is flexible! Feel free to mix in different seafood options like lobster or scallops alongside shrimp and crab for an exciting twist on the classic dish.
-
Customize Spice Levels: Adjust the cayenne and paprika to suit your taste. Whether you want a mild comfort dish or a spicy kick, tailoring the heat will make your shrimp and crab mac and cheese truly your own.
What to Serve with Cajun Shrimp and Crab Mac and Cheese
Looking to create a full meal experience that beautifully complements this creamy seafood delight?
-
Garlic Bread: A perfect addition, offering a crispy contrast to the creamy mac while letting you savor every last bite. The buttery garlic flavor accentuates the richness of the dish beautifully.
-
Caesar Salad: Crisp romaine and tangy dressing bring a refreshing balance to the indulgence of the mac and cheese, creating a delightful contrast in textures and flavors.
-
Roasted Asparagus: This tender yet slightly crunchy side provides a vibrant green color and a natural sweetness, pairing seamlessly with the savory seafood elements of your casserole.
-
Coleslaw: Creamy, crunchy, and tangy, coleslaw offers a lightness that counteracts the richness of the mac and cheese. It adds a fresh crunch that everyone will enjoy.
-
Sweet Tea or Lemonade: Sipping on these refreshing drinks while enjoying your meal will enhance the southern flair of the dish, rounding out this home-cooked experience.
-
Chocolate Cake: For dessert, indulge in a slice of moist chocolate cake. Its decadent flavor offers a delightful end to the meal, satisfying sweet cravings after a savory entrée.

Cajun Shrimp and Crab Mac and Cheese Recipe FAQs
What type of crab should I use for this recipe?
You can choose between 2 lbs of fresh crab legs or 2.5 cups of imitation crab meat. Fresh crab brings a sweeter, more delicate taste, while imitation crab is budget-friendly and still offers a satisfying texture, making it a fantastic choice for those looking to save a bit while still enjoying this creamy dish.
How should I store leftovers of Shrimp and Crab Mac and Cheese?
Store any leftovers in an airtight container in the refrigerator for up to 3 days. It’s essential to keep it covered to prevent moisture loss and maintain flavor. You can reheat it in the oven or microwave until hot.
Can I freeze Shrimp and Crab Mac and Cheese?
Absolutely! To freeze, let the mac and cheese cool completely, then transfer it to a freezer-safe container. It can be stored for up to 2 months. Make sure to wrap it tightly or use a vacuum-sealed bag to avoid freezer burn.
How do I reheat frozen mac and cheese?
To reheat, first, thaw the mac and cheese in the refrigerator overnight. Once thawed, preheat your oven to 350°F (177°C). Transfer it to an oven-safe dish, add a splash of milk to keep it creamy, and warm it in the oven for about 20-30 minutes or until heated through.
Can my pet enjoy this dish?
It’s best to avoid giving your pet human food that contains ingredients like cheese, shrimp, and spices, which can be harmful to them. Always check with your veterinarian first before sharing any food that isn’t specifically formulated for pets.
What should I do if my mac and cheese is too dry after baking?
If your mac and cheese turns out dry, it may need more sauce to retain creaminess. Next time, consider adding a little more milk or evaporated milk to the mixture before baking. Additionally, let it rest after baking, as this helps moisture distribute evenly throughout the dish.

Creamy Shrimp and Crab Mac and Cheese for Ultimate Comfort
Ingredients
Equipment
Method
- Prepare Your Ingredients: Gather all your ingredients for the Shrimp and Crab Mac and Cheese.
- Cook the Shrimp: Heat olive oil in a skillet, season shrimp, and sauté for 4-6 minutes until cooked.
- Preheat Your Oven: Set oven to 350°F and grease a baking dish.
- Cook the Pasta: Boil salted water and cook elbow macaroni until al dente, then drain.
- Combine the Pasta and Seafood: In a bowl, mix macaroni with shrimp, crab meat, and basil.
- Whisk Together the Dairy Mixture: Mix milk, evaporated milk, spices, and eggs until smooth.
- Mix in the Cheeses: Stir grated cheeses into the pasta mixture and transfer to baking dish.
- Add Toppings: Sprinkle remaining cheeses and Cajun seasoning on top.
- Bake the Casserole: Bake for 45-55 minutes until bubbly and golden brown.
- Rest Before Serving: Allow to sit for 20-30 minutes before serving.

Leave a Reply