Easy Cajun Salmon and Shrimp Bake in Garlic Butter

Sizzling garlic butter meets bold Cajun spices in this effortless sheet pan seafood bake. If you need a quick, impressive dinner that delivers restaurant-quality results in under thirty minutes, this recipe is your answer. Flaky salmon and plump shrimp roast together on a single sheet, soaking up a rich, seasoned butter glaze that caramelizes beautifully. It is a foolproof meal that brings robust flavor to your table with minimal cleanup.

This Cajun salmon and shrimp bake is the ultimate solution for busy weeknights and special occasions alike. By combining two premium seafood favorites on one sheet pan, you create a dish that looks luxurious but requires very little actual effort.

The key to the recipe lies in the seasoned butter mixture, which combines melted butter with minced garlic and a heavy hand of Cajun spices. Brushed generously over the raw salmon and shrimp, this mixture creates a protective, flavorful barrier that keeps the seafood incredibly juicy and tender as it bakes in a hot oven.

Ingredients

Why this recipe works

Roasting seafood at a high temperature on a single baking sheet is a highly effective cooking method because it ensures even heat distribution and rapid caramelization. The intense heat of a four-hundred-degree oven quickly sears the exterior of the shrimp and salmon, sealing in their natural juices while preventing them from drying out.

Because the seafood is arranged in a single layer, the circulating hot air can cook everything uniformly, ensuring that the salmon flakes perfectly at the exact moment the shrimp turn plump and opaque.

The melted butter glaze serves a dual purpose in this recipe, acting as both a flavor vehicle and a cooking medium. Butter is rich in fat, which carries the aromatic garlic and the complex, smoky notes of the Cajun seasoning deep into the seafood. As the dish bakes, the water content in the butter evaporates, leaving behind pure milk solids and fat that gently fry the garlic and caramelize the natural sugars in the seafood. This creates a deeply flavorful, glistening sauce right on the pan.

Notes and substitutions

For the best results, select high-quality salmon fillets of uniform thickness, which ensures they cook at the same rate. Keep the skin on the salmon to help hold the fillets together during baking and to retain moisture, though skinless fillets will also work perfectly.

Choose large or jumbo shrimp that have been peeled and deveined, leaving the tails on for an elegant presentation. Fresh shrimp are excellent, but frozen shrimp that have been thoroughly thawed and patted completely dry with paper towels will work just as well.

A sturdy, rimmed baking sheet is essential for this recipe to contain the delicious, bubbling garlic butter and prevent any spills in your oven. To make cleanup even easier, you can line the baking sheet with heavy-duty aluminum foil or parchment paper before arranging the seafood.

When choosing a Cajun seasoning, look for a high-quality blend from the spice aisle, or mix your own using paprika, garlic powder, onion powder, oregano, thyme, cayenne pepper, and salt, adjusting the salt level to your personal preference.

• unsalted butter: salted butter, reducing the added salt in the Cajun seasoning accordingly
• lemon: lime for a slightly different citrus profile

Equipment

• Baking sheet
• Small bowl
• Pastry brush
• Instant-read thermometer