Cajun shrimp on a serving platter

Cajun Shrimp

August 4, 2025 By Kathleen | Leave a Comment

This easy Cajun shrimp recipe is bursting with bold flavor, garlic butter, and Southern spice—cooked in a cast iron skillet for perfect sear and richness.

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I’m so excited to share this bold, garlic-butter Cajun shrimp — cooked hot and fast in a cast-iron skillet for deep flavor and the perfect sear. It’s buttery, garlicky, and just spicy enough to bring that Louisiana-inspired heat without overpowering the shrimp.

Unlike gumbo or stew, this dish comes together in about 30 minutes with no roux and no long simmer — just big, smoky flavor layered into a quick pan sauce you’ll want to soak up with crusty bread.

Shrimp always felt like a “special occasion” dinner when I was growing up, but this recipe makes it easy enough for a weeknight. If you love Louisiana comfort dishes like my Jambalaya or Chicken and Sausage Gumbo, this skillet version is a faster way to bring those bold Cajun flavors to the table.

✨ BEFORE YOU BEGIN

✨ Choose the right shrimp: Use raw large or jumbo shrimp (fresh, or frozen and fully thawed). Peeled and deveined shrimp work best so the seasoning sticks — I used 21–25 count.

✨ Pat the shrimp dry: This is the secret to a good sear and a sauce that stays rich (not watery). Don’t skip it!

✨ Prep everything first: Once the skillet is hot, this recipe moves fast — mince the garlic, juice the lemon, and measure everything before you start.

✨ Use a big cast-iron skillet: It holds heat like a champ for that golden sear. No cast iron? A heavy-bottomed pan works too.

✨ Adjust the heat to your taste: This has a Cajun kick, but you can dial it up or down. If you want it mellower, stir in a little extra butter at the end (or a pinch of brown sugar if you like that sweet-heat vibe).

✨ Use only the green parts of the scallions: The whites can overpower the sauce — save those for another recipe.

✨ Keep shrimp from turning rubbery: Cook just until pink and opaque — about 3 minutes per side depending on size. Overcooking is the fastest way to tough shrimp.

✨ Want to grill or bake it instead? Grill on skewers 2–3 minutes per side, or bake at 400°F for about 8 minutes, just until the shrimp turn opaque.

CAJUN SHRIMP INGREDIENTS + KEY NOTES

Cajun Seasoning: Not all Cajun spice blends are created equal—some are spicier than others. I like Slap ya Mama brand. Remember, you’ll use half for marinating and half for the sauce.
Thyme: Using fresh thyme adds great flavor, but dried thyme (about 1 teaspoon) can be used in a pinch. Be sure to remove the woody stems before serving.
Tomato Paste: Be sure to cook it for a few minutes to get rid of the raw flavor and enhance richness.
Green Onions: Only the tops, green parts, are used here for a light and mild onion flavor.
Shrimp: You can use either fresh or frozen shrimp in this recipe. If you use frozen shrimp, it needs to be thawed before you start the recipe and excess water needs to be squeezed out. Tail-on or tail-off is a personal preference (tail-on looks prettier, but tail-off is easier to eat).

🥣 HOW TO MAKE CAJUN SHRIMP

⭐ Pro Tips

⭐ Dry shrimp = better sear: Patting the shrimp completely dry before seasoning is what gives you that golden edge instead of a watery skillet.

⭐ Bloom the tomato paste: Let the tomato paste cook in the butter for a few minutes before adding broth. This deepens the flavor and removes any raw, acidic taste.

⭐ Don’t crowd the pan: If your skillet is small, cook the shrimp in batches. Overcrowding causes steaming instead of searing.

⭐ Reduce the sauce properly: Let the butter, broth, and seasoning reduce by about half before adding the shrimp. That concentrated base is what makes the sauce cling beautifully.

⭐ Watch the clock on shrimp: Large shrimp need only about 2–3 minutes per side. The moment they turn pink and opaque, they’re done.

⭐ Finish with lemon at the end: If you want a brighter finish, add an extra squeeze of lemon right before serving to wake everything up.

⭐ Taste before salting more: Cajun seasoning and broth already contain salt — adjust at the very end.

STORING + FREEZING + MAKE-AHEAD

How Long Can You Keep This In The Fridge?

The shrimp will keep in the fridge for up to 3 days. Stored properly in an airtight container.

Can you freeze it?

Yes! Here’s how to preserve the best texture and flavor:
- Let the shrimp cool completely and remove from skewers.
- Freeze in a single layer on a parchment-lined baking sheet until solid (about 1–2 hours), then transfer to a freezer-safe bag or airtight container.
- Thaw overnight in the fridge before reheating gently.

Make-Ahead Tips:

Marinate the shrimp ahead of time: You can prep and marinate the shrimp up to 8 hours in advance. Keep them in the fridge in a sealed bag or container—just be sure not to go much longer or the acid and salt may start to change the texture.
Chop and measure ingredients: Mince the garlic, juice the lemon, slice the green onions, and measure out the seasonings ahead of time. Store prepped ingredients in airtight containers in the fridge for up to 1 day to make cooking a breeze.
Make the sauce base early: The butter, garlic, tomato paste, broth, and seasonings can be simmered and reduced ahead of time. Cool and refrigerate the sauce (without the shrimp) for up to 2 days. Gently reheat it in your skillet and add the shrimp when ready to serve.
Leftovers reheat well: While shrimp is best fresh, leftovers can be stored in the fridge for 1–2 days. Reheat gently over low heat to avoid overcooking the shrimp.

What To Serve With Cajun Shrimp

Fresh + Crisp Sides

We love this with something cool and crunchy to balance the buttery heat — KFC Coleslaw, House Salad tossed with Buttermilk Dressing, Carrot Salad, or Creamy Fruit Salad all work beautifully.

Comforting Sides

If you want something warm on the plate, go with classic Southern sides like Southern Collard Greens, Southern Style Green Beans, Simple Skillet Corn, or Smothered Potatoes.

Cozy Breads

You need something to soak up that garlic-butter sauce. Bisquick Biscuits, Cheddar Biscuits, or Butter Swim Biscuits are all perfect — and if you’re short on time, grab a crusty loaf of bread from the store and call it a win.

Sweet Finishes

Keep it Southern and cozy with Peach Cobbler, Coca Cola Cake, Possum Pie, or Buttermilk Pie to round out the meal.

✦ Frequently Asked Questions

✦ What kind of shrimp should I use?
Large or jumbo raw shrimp (21–25 count works great). Fresh or frozen and thawed both work — just make sure they’re peeled and deveined.

✦ Can I use pre-cooked shrimp?
It’s not recommended. Pre-cooked shrimp will overcook and turn rubbery when heated in the sauce.

✦ Is this dish very spicy?
It has a Cajun kick, but it’s not overwhelmingly hot. You can reduce the Cajun seasoning or red pepper flakes for a milder version.

✦ Can I make this dairy-free?
Yes. Substitute olive oil for the butter. The flavor will be slightly less rich, but still delicious.

✦ Can I grill this instead?
Yes. Skewer the shrimp and grill over medium-high heat for about 2–3 minutes per side. You can simmer the sauce separately and spoon it over after grilling.

✦ What should I serve with Cajun shrimp?
Crusty bread, white rice, or even creamy grits are perfect for soaking up the garlic-butter sauce.

✦ How do I store leftovers?
Refrigerate in an airtight container for up to 2 days. Reheat gently over low heat to avoid overcooking the shrimp.

✦ Can I freeze Cajun shrimp?
It’s not ideal. Shrimp can become rubbery when thawed and reheated.

MORE DELICIOUS SHRIMP DISHES

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