If you’re longing for a dish that perfectly balances spice, creaminess, and a touch of lightness, this Lightened Creamy Cajun Shrimp Pasta Recipe is your new best friend in the kitchen. Imagine tender, seasoned shrimp swimming in a rich, velvety sauce that’s been cleverly lightened with milk and fresh tomatoes, all tossed with al dente spaghetti and vibrant baby spinach. This recipe delivers all the indulgent flavors you crave without the heaviness, making it an easy weeknight winner or a crowd-pleaser for guests. Trust me, once you try this, it’ll become one of your go-to meals for sharing warmth and bold taste with the people you love.

Ingredients You’ll Need
These ingredients are refreshingly simple yet each plays a crucial role in crafting the flavor harmony and appealing texture of our Lightened Creamy Cajun Shrimp Pasta Recipe. From the perfectly spiced shrimp to the creamy sauce and fresh greens, every component brings something special to the table.
- Spaghetti (1 box, 16 oz): Your classic pasta base that soaks up the sauce beautifully and provides that comforting, hearty feel.
- Shrimp (1 lb, peeled & deveined): Tender and juicy, shrimp cooks quickly and adds a wonderful protein punch with a subtle sweetness.
- Cajun seasoning (¼ cup, divided): The star spice blend giving this dish its signature kick, smoky depth, and vibrant color.
- Salt and black pepper (pinch): Basic seasonings to enhance every flavor layer just right.
- Olive oil (1 tbsp): Used for sautéing, it brings a delicate fruity richness that complements the spices.
- Butter (1 tbsp): Adds creaminess and helps develop those irresistible garlic and tomato aromas.
- Garlic cloves (3, minced): Provides a fragrant, savory backbone that wakes up every bite.
- Diced tomatoes (2 cans, 14 oz each, undrained): They give the sauce a fresh, tangy brightness and lighten it up naturally.
- Milk (2 cups): Keeps the creaminess without using heavy cream, making the sauce smooth and silky yet lighter.
- All-purpose flour (2 tbsp): Helps thicken the sauce just enough, giving it perfect clinginess.
- Parmesan cheese (½ cup, grated): Adds nutty, savory depth and a lovely cheesy finish.
- Baby spinach (8 oz): Boosts nutrition, color, and a fresh green contrast that gently wilts into the sauce.
- Fresh parsley (for garnish): A pop of fresh herbal flavor and beautiful color to brighten the dish visually and in taste.
How to Make Lightened Creamy Cajun Shrimp Pasta Recipe
Step 1: Cook the Spaghetti
Start by bringing a pot of salted water to a boil and cook the spaghetti according to the package instructions until it’s perfectly al dente. Once done, drain the pasta and keep it warm while you prepare the rest. The pasta is your base, so getting this step just right is key to the final texture of the dish.
Step 2: Season the Shrimp
In a mixing bowl, toss the peeled and deveined shrimp with half of your Cajun seasoning, along with a pinch of salt and black pepper. This allows the shrimp to soak up those bold flavors fully and get ready to deliver that signature spicy kick.
Step 3: Sauté the Shrimp
Heat the olive oil in a large Dutch oven or heavy-bottomed pot over medium-high heat. Once hot, add the seasoned shrimp and cook for just a few minutes until they turn opaque and slightly golden. Remove the shrimp and set them aside, taking care not to overcook—this keeps them tender and juicy for the final toss.
Step 4: Build the Sauce Base
In the same pot, add butter and minced garlic. Sauté gently until the garlic is aromatic, about 1 to 2 minutes. Then stir in the undrained diced tomatoes and the milk to create the base of your luscious sauce. This combo brings the brightness and creaminess that make this recipe so comforting.
Step 5: Thicken the Sauce
In a small bowl, whisk a quarter cup of the milk and tomato mixture with the flour to form a smooth roux. Pour this back into the pot and whisk continuously until the sauce thickens to a luxuriously creamy consistency. This step ensures your sauce will cling beautifully to the pasta and shrimp without being heavy.
Step 6: Add Final Flavors
Stir in the grated Parmesan cheese and the remaining Cajun seasoning, then let the sauce simmer gently over medium heat until thick and full of flavor, stirring occasionally. Once it looks rich and inviting, turn off the heat—your sauce is perfectly seasoned and ready for the star ingredients.
Step 7: Combine Everything
Return the cooked shrimp and spaghetti to the pot, tossing everything together to ensure the pasta is thoroughly coated with that creamy Cajun sauce. Finally, stir in the baby spinach and allow it to wilt gently in the warm sauce for a minute or two. This not only adds vibrant color but also a subtle, fresh earthiness that balances the richness.
Step 8: Garnish and Serve
Sprinkle fresh parsley and an extra handful of grated Parmesan over the top for a fresh herbal punch and cheesy finish. Serve the pasta immediately while it’s warm, creamy, and irresistible.
How to Serve Lightened Creamy Cajun Shrimp Pasta Recipe

Garnishes
Brighten your dish with fresh parsley as a classic herb garnish, or toss in some extra Parmesan cheese for a sharp, savory boost. A sprinkling of red pepper flakes can also add an extra smoky heat if you’re feeling adventurous.
Side Dishes
Pair this pasta with a crisp green salad tossed in a light vinaigrette to contrast the creamy sauce. Garlic bread or warm crusty rolls are fantastic for mopping up every last bit of that flavorful sauce. For a veggie option, roasted asparagus or steamed broccoli brings lovely color and crunch.
Creative Ways to Present
Serve the pasta in wide, shallow bowls to showcase the gorgeous colors and layered textures. For a fun twist, try individual servings in charming ramekins baked briefly to develop a golden top. Adding a lemon wedge on the side can offer guests a fresh, zesty squeeze that lifts the entire dish.
Make Ahead and Storage
Storing Leftovers
Place any leftover Lightened Creamy Cajun Shrimp Pasta Recipe in an airtight container and refrigerate for up to three days. The flavors marry together beautifully overnight, making for an even tastier meal the next day.
Freezing
This pasta doesn’t freeze as well as it tastes fresh because cream-based sauces can separate. However, if you must freeze, store the shrimp and pasta separately from the sauce for better texture when reheated. Use a freezer-safe container and thaw overnight in the fridge.
Reheating
To reheat, gently warm the pasta over low heat on the stovetop, adding a splash of milk or water to revive the creamy sauce consistency. Stir frequently to prevent sticking and to ensure that all the flavors stay vibrant and fresh.
FAQs
Can I use a different type of pasta for this recipe?
Absolutely! While spaghetti works beautifully, feel free to swap in penne, fettuccine, or even gluten-free pasta depending on your preference or dietary needs.
Is this recipe very spicy?
The Cajun seasoning delivers a pleasant medium heat that can be adjusted by reducing or doubling the amount. You can also tone it down by using a mild Cajun blend or omitting extra pepper.
Can I make this recipe dairy-free?
Yes! Substitute the milk with a creamy plant-based milk like oat or almond, and use dairy-free butter and Parmesan alternatives to keep the sauce rich without dairy.
How do I know when the shrimp are cooked perfectly?
The shrimp should turn opaque and develop a slight pinkish color with firm texture; this usually takes just a few minutes per side. Overcooking makes them tough, so keep a close eye during sautéing.
Can I prepare parts of this recipe in advance?
Definitely! You can cook the pasta and even season the shrimp a few hours ahead. Keep them refrigerated and assemble right before serving to keep everything fresh and flavorful.
Final Thoughts
This Lightened Creamy Cajun Shrimp Pasta Recipe is a true celebration of flavor without feeling heavy, making it a delightful addition to your recipe collection. Its comforting creaminess perfectly complements the vibrant spices and fresh greens, resulting in a dish that feels both indulgent and nourishing. I can’t wait for you to try it and see just how easy it is to impress friends or cozy up at home with a plate full of this goodness.
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Lightened Creamy Cajun Shrimp Pasta Recipe
- Prep Time: 20 minutes
- Cook Time: 30 minutes
- Total Time: 50 minutes
- Yield: 8 servings
- Category: Main Dish
- Method: Stovetop
- Cuisine: American
- Diet: Low Fat
Description
This Lightened Creamy Cajun Shrimp Pasta is a flavorful, healthier twist on a classic creamy pasta dish. Tender shrimp seasoned with a zesty Cajun blend are cooked to perfection and tossed in a light, creamy sauce made with milk and Parmesan cheese, combined with spinach and diced tomatoes for a nutritious and satisfying meal.
Ingredients
Pasta
- 1 (16 oz) box spaghetti
Shrimp and Seasoning
- 1 lb shrimp, peeled, deveined, tail off
- ¼ cup Cajun seasoning, divided
- Pinch of salt and black pepper
Sauce
- 1 tablespoon olive oil
- 1 tablespoon butter
- 3 cloves garlic, minced
- 2 (14 oz) cans diced tomatoes, undrained
- 2 cups milk
- 2 tablespoons all-purpose flour
- ½ cup grated Parmesan cheese
Greens and Garnish
- 1 (8 oz) bag baby spinach
- Fresh parsley, for garnish
Instructions
- Cook Pasta: Cook spaghetti according to package directions until al dente. Drain thoroughly and keep warm while preparing the rest of the dish.
- Season Shrimp: In a bowl, toss the peeled and deveined shrimp with half of the Cajun seasoning, plus a pinch of salt and black pepper, ensuring they are evenly coated.
- Sauté Shrimp: Heat olive oil in a large Dutch oven over medium-high heat. Add the seasoned shrimp and cook until they turn opaque, about 2-3 minutes per side. Remove cooked shrimp from the pot and set aside.
- Prepare Sauce Base: Add butter and minced garlic to the same pot. Cook for 1-2 minutes until the garlic is fragrant but not browned. Then stir in the undrained diced tomatoes and milk, combining them well.
- Make Roux and Thicken Sauce: In a separate small bowl, whisk ¼ cup of the milk-tomato mixture with the all-purpose flour to create a smooth slurry. Return this roux mixture to the pot and whisk continuously over medium heat until the sauce thickens and becomes smooth, about 3-5 minutes.
- Finish Sauce: Stir in the grated Parmesan cheese and the remaining Cajun seasoning. Simmer the sauce over medium heat, stirring occasionally, until it reaches a creamy consistency. Then turn off the heat.
- Combine Pasta and Shrimp: Add the cooked shrimp and drained spaghetti directly into the sauce. Toss everything together to coat the pasta and shrimp evenly.
- Add Spinach and Serve: Stir in the baby spinach and allow it to wilt gently in the warm sauce. Garnish with fresh parsley and extra Parmesan cheese if desired. Serve immediately for best taste.
Notes
- You can substitute the milk with a lower-fat version to make this dish even lighter.
- For extra heat, add a pinch of cayenne pepper along with the Cajun seasoning.
- This recipe works well with fettuccine or linguine as an alternative to spaghetti.
- If fresh parsley isn’t available, dried parsley or basil can be used as a garnish.
- Make sure not to overcook the shrimp to keep them tender and juicy.

