Shrimp Boil Recipe on the Grill: Smoky Cajun Feast in Foil Packets

There’s nothing like the smoky, spicy aroma of a shrimp boil cooking on the grill to bring people together. This method captures all the flavors of a traditional Cajun boil with minimal cleanup.

By sealing everything in foil packets, the shrimp, corn, and potatoes steam in their own juices while absorbing the bold Cajun seasoning. The grill adds that extra layer of smokiness you can’t get indoors.

Each packet opens to reveal perfectly cooked shrimp with a slight char, tender vegetables, and a buttery, spiced broth that’s begging to be soaked up with crusty bread.

The entire meal cooks in 20 minutes, making it a foolproof option for summer gatherings or quick weeknight dinners.

Ingredients for Shrimp Boil Recipe on the Grill

All the bold Cajun flavors packed into a single foil packet for the grill.

The shrimp is the star here. Wild-caught Gulf shrimp (16-20 count per pound) gives the best texture and flavor, but farmed works in a pinch. Look for shrimp labeled peeled and deveined to save time. For the potatoes, red or baby Yukons hold their shape better than russets. Most seafood counters will have everything you need, but Whole Foods or Publix have great pre-mixed Cajun blends if you want to skip measuring spices.

No Cajun seasoning? Mix 1 tbsp paprika, 1 tsp each garlic powder, onion powder, oregano, plus ½ tsp each cayenne, black pepper, and salt. Andouille can be omitted for strict pescatarian diets—smoked turkey sausage works too. Fresh corn not in season? Frozen and thawed works surprisingly well. The butter can be swapped for olive oil, but you’ll lose some richness (worth it if you prefer).

Foil packets can be prepped 2 hours ahead and refrigerated until grilling. Leftovers keep in the fridge for 2 days—reheat gently in the oven. The broth soaks into the bread beautifully, so don’t skip it. Freezing isn’t recommended; shrimp gets rubbery.

Step-by-Step Instructions for Shrimp Boil on the Grill

This method delivers perfectly cooked seafood and vegetables with smoky depth in every bite.

Step 1: Prepare the Foil Packets and Base Layer

Tear off four large sheets of heavy-duty foil, about 18 inches long each. Divide the 1.5 lb red potatoes evenly among them, placing the halved potatoes in a single layer on one side of each sheet. I always use baby or new potatoes as they cook through quickly and absorb the flavors beautifully.

Sprinkle the potatoes with half of the 2 tbsp Cajun seasoning and half of the 1 tbsp Old Bay seasoning. Add 2 tbsp of the 0.5 cup unsalted butter cubes to each packet. The seasoning and butter will create a rich, aromatic base as everything steams in the foil.

Step 2: Add the Remaining Ingredients and Seal

Divide the 4 pieces corn on the cob (cut into thirds) and the 12 oz andouille sausage slices evenly among the packets, placing them on top of the potatoes. The sausage will release its smoky, spicy flavors into the mix, complementing the Cajun seasoning perfectly.

Add the 1.5 lb large shrimp on top, ensuring they’re in a single layer for even cooking. Distribute the remaining Cajun seasoning, Old Bay seasoning, and butter over the shrimp. Sprinkle the 6 cloves minced garlic evenly across all packets. Fold the foil over the ingredients, crimping the edges tightly to seal in all the flavors and juices.

Step 3: Grill the Packets to Perfection

Preheat your grill to medium-high heat (around 400°F). Place the foil packets directly on the grates and cook for 20-25 minutes. The packets will puff up as the ingredients steam inside, and you’ll start to smell the aromatic blend of spices and seafood.

Flip the packets once halfway through cooking to ensure even heat distribution. The shrimp are done when they turn opaque and pink, and the potatoes should be tender when pierced with a fork. Avoid opening the packets early, as the steam is essential for cooking everything through.

Step 4: Serve and Garnish

Carefully open the packets, as the steam inside will be very hot. Transfer the contents to a large serving platter or individual plates. The shrimp, sausage, potatoes, and corn should all be infused with the smoky, spicy flavors of the seasonings and butter.

Garnish with the 0.25 cup chopped fresh parsley and serve with lemon wedges from the 1 whole lemon for squeezing over the top. Don’t forget the 1 piece crusty bread to soak up the delicious broth left in the foil. Serve immediately and enjoy the feast.

Best Sauces and Condiments for This shrimp boil recipe on the grill

Classic Cocktail Sauce

I always serve this with a tangy homemade cocktail sauce. Mix ½ cup ketchup, 2 tbsp prepared horseradish, 1 tbsp lemon juice, and ½ tsp Worcestershire sauce for the perfect balance of sweet, spicy, and acidic flavors. 💫

Garlic Butter Dip

Melt ¼ cup unsalted butter with 2 minced garlic cloves and 1 tbsp fresh parsley. This rich, aromatic dip complements the Cajun spices beautifully. I often add a pinch of Old Bay seasoning for extra depth.

Spicy Remoulade

For a Louisiana twist, blend ½ cup mayonnaise, 1 tbsp Dijon mustard, 1 tbsp hot sauce, and 1 tsp Cajun seasoning. This creamy, spicy sauce is a game-changer with the smoky shrimp.

Lemon Aioli

Whisk ½ cup mayonnaise with 1 tbsp lemon zest, 1 tbsp lemon juice, and 1 minced garlic clove. The bright citrus notes cut through the richness of the boil. 🍋

Simple Garnishes

Don’t overlook the power of fresh garnishes. Extra lemon wedges and chopped parsley add freshness. I also keep a small bowl of melted butter with extra Cajun seasoning for dipping.

Frequently Asked Questions