Our Blackstone Blackened Fish Sandwich comes together in about 20 minutes and is a fantastic quick lunch or dinner when you want a flavorful seafood meal without a lot of fuss. It’s fresh, fast, and full of bold Cajun seasoning—perfect for the griddle or a hot skillet.
Blackened Fish Sandwich
You don’t need heavy breading or deep-frying to enjoy a satisfying fish sandwich. A hot Blackstone griddle or a cast-iron skillet gives these fillets a crisp, well-seasoned crust while keeping the interior flaky and moist. Serve on toasted buns with a bright green like baby arugula and a simple sauce for a balanced, crowd-pleasing sandwich.
More Blackstone Recipes
Recipe Shopping List
Gather these simple ingredients before you start. Read the instructions carefully while cooking for best results.
- Firm white fish fillets (halibut, cod, lingcod, rockfish, tilapia, walleye, etc.)
- Blackening seasoning or your favorite Cajun blackening blend
- Olive oil
- Brioche or other soft sandwich buns
- Mayo, tartar sauce, or lemon aioli
- Baby arugula or other peppery greens
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How To Make This Recipe
This sandwich is straightforward and fast. Below is a concise overview; follow the full recipe card for exact quantities and times.
- Season the fish — Trim the fillets so they fit the buns, then coat both sides liberally with blackening seasoning.
- Preheat the griddle or pan — Give your Blackstone or skillet 10–15 minutes to reach a steady medium-high temperature so the fish develops a good crust.
- Cook the fillets — Lightly oil the surface and cook the fish 2–4 minutes per side depending on thickness. Remove when the interior reaches about 140–145°F, and the fish flakes easily.
- Assemble the sandwiches — Toast the buns, spread with mayo, tartar sauce, or lemon aioli, layer the fish and top with arugula. Add a squeeze of lemon if you like.
Try it with a simple lemon aioli for extra brightness!
Serve This With
Classic pairings elevate this sandwich. A crisp slaw or salad adds freshness and texture:
- Homemade creamy coleslaw for a classic combination
- Vinegar-based coleslaw if you prefer a tangier side
- A simple Greek-style salad with cucumber, tomato, olives, and feta
- Smashed potatoes or roasted potatoes for a heartier meal
Choose sides based on whether you want the meal light (greens and slaw) or more indulgent (potatoes). All work beautifully with the smoky, spicy notes from the blackening seasoning.
Recipe FAQ
Use a firm white fish that holds together when cooked. Halibut, cod, rockfish, lingcod, walleye, mahi mahi, or similar varieties all work well. Choose the freshest fillets available for the best texture.
Store leftovers in an airtight container in the refrigerator and eat within 1–2 days. Fish is best when freshly cooked, so avoid making large excesses unless you plan to reheat carefully.
Avoid the microwave when possible. A gentle reheating method is to place the sealed fish in a warm water bath for 10–12 minutes or warm it in a low oven until just heated through. This helps preserve moisture and texture.
Yes. A well-seasoned cast-iron skillet or a heavy nonstick pan works great. Cook over medium to medium-high heat and follow the same timing guidelines as for a griddle.
Try a beer-battered or fried version if you want a different texture, but the blackened method is faster and lighter.
More Blackened Seafood Recipes
- Traeger Blackened Fish Tacos
- Blackstone Blackened Shrimp Tacos
- Blackened Pork Chops
- Blackened Shrimp Pasta
- Blackened Shrimp Caesar Wrap
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Blackstone Blackened Fish Sandwich
Fresh white fish seasoned with Cajun-style blackening seasoning and quickly cooked on a hot griddle or skillet. Serve on toasted buns with arugula and your favorite sauce for a fast, flavorful meal.
Ingredients
- 6 white fish fillets, skinless
- 2 tablespoons blackening seasoning
- 2 tablespoons olive oil
- 6 brioche buns
- Baby arugula
- Tartar sauce or mayo
Instructions
- Season the fillets with blackening seasoning on both sides and set aside.
- Preheat your Blackstone or skillet over medium-high heat for 10–15 minutes.
- Spread a thin coat of oil on the griddle or pan and place the fish down. Cook 2–5 minutes per side depending on thickness until cooked through.
- Remove the fish from the griddle and let rest briefly.
- Toast the buns and assemble: bun, sauce, fish, arugula, top bun. Serve immediately.
Suggested Tools
- Turner or spatula suitable for griddle use
- Flat-top griddle or a heavy-duty cast-iron skillet
- Blackening seasoning blend
Nutrition Information
Yield: 6 | Serving Size: 1
Amount Per Serving (approx.): Calories 529, Total Fat 23g, Saturated Fat 9g, Cholesterol 265mg, Sodium 2063mg, Carbohydrates 34g, Fiber 2g, Sugar 6g, Protein 45g
Nutrition data provided here is an estimate.
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