Cooking Techniques
Airfryfeast
Air Fryer Ketogenic Spicy Cajun Grilled Swordfish Steaks
By Airfryfeast Test KitchenReviewed by Airfryfeast Editorial TeamPublished Jun 13, 2026
Cajun
20 mins
air-fryer-friendlyseafoodfishketogeniclow-carbspicygluten-freequickweeknight-dinner
Firm swordfish steaks get a bold Cajun crust in the air fryer for a quick, low-carb seafood dinner with lemon and parsley.
Prep
10 min
Cook
10 min
Total
20 min
Servings
2
Difficulty
easy
Cuisine
Cajun
Ingredients
Servings
2
- 2 swordfish steaks (6-8 ounces each, about 1-inch thick)
- 1 tablespoon olive oil
- 1 teaspoon smoked paprika
- 1 teaspoon garlic powder
- 1 teaspoon onion powder
- 1 teaspoon dried oregano
- 1 teaspoon dried thyme
- 1/2 teaspoon cayenne pepper (adjust to taste)
- 1/2 teaspoon black pepper
- 3/4 teaspoon kosher salt
- 1/2 teaspoon dried white pepper (optional)
- 1/4 teaspoon cayenne pepper flakes (optional, for extra heat)
- 1 lemon, cut into wedges (for serving)
- Fresh parsley, chopped (for garnish)
Instructions
-
Pat the swordfish steaks dry with paper towels to remove excess moisture.
-
In a small bowl, combine smoked paprika, garlic powder, onion powder, dried oregano, dried thyme, cayenne pepper, black pepper, kosher salt, and white pepper (if using). Mix well to create the Cajun spice blend.
-
Brush both sides of each swordfish steak with olive oil to help the seasoning stick and enhance crisping.
-
Generously rub the Cajun spice blend evenly over both sides of each steak, pressing lightly to adhere the spices.
-
Preheat your air fryer to 400 F (200 C) for 3-5 minutes.
-
Place the seasoned swordfish steaks in the air fryer basket in a single layer, making sure they don't overlap for even cooking.
-
Air fry at 400 F for 8-10 minutes, flipping halfway through at 4-5 minutes. The swordfish should develop a light golden crust and reach an internal temperature of 145 F (63 C).
-
Carefully remove the steaks from the air fryer and let them rest for 3 minutes to allow the juices to redistribute.
-
Serve your spicy Cajun grilled swordfish steaks with fresh lemon wedges and garnish with chopped parsley for a pop of color and freshness.
-
Enjoy immediately with your favorite ketogenic sides like sautéed greens or cauliflower rice.
Frequently Asked Questions
- How do I keep swordfish from drying out?
- Cook just to 145 F and rest for 3 minutes. Pull the steaks as soon as they flake but still look moist in the center.
- Can I make this less spicy?
- Yes. Cut the cayenne in half and skip the pepper flakes, then add extra smoked paprika for Cajun-style color.
- Is this recipe keto-friendly?
- Yes. The seasoning uses spices, oil, fish, lemon, and herbs without breading or added sugar.
- Do I need to flip swordfish in the air fryer?
- Yes. Flipping halfway helps both sides form a light crust and keeps the thick steak cooking evenly.
Ingredient Replacements
Use these swaps when you need to keep the recipe close to its intended texture, timing, and dietary promise.
- Swordfish steaks: Use mahi-mahi, tuna steaks, or salmon fillets of similar thickness; check early because leaner fish can dry out faster.
- Olive oil: Avocado oil keeps the keto profile and handles 400 F heat well.
- Cayenne pepper: Reduce to 1/4 teaspoon for mild heat, or replace with smoked paprika for color without sharp spice.
- Dried oregano and thyme: Use 2 teaspoons salt-free Cajun seasoning, then reduce the added salt to taste.
- Lemon wedges: Lime wedges add a brighter finish and pair well with the Cajun crust.
Tips
Air Fryer Model Notes
Swordfish is dense, so preheating matters. Basket models usually cook 1-inch steaks in 8 to 10 minutes, while oven-style air fryers may need the upper rack or one extra minute for browning.
Crispiness Control
Pat the steaks dry before oiling so the spice rub forms a crust. Leave space between steaks and flip gently halfway through. If the surface looks dry, mist once with oil before the second side cooks.
Reheat In The Air Fryer
Reheat at 350 F for 3 to 4 minutes, just until warmed through. Swordfish becomes firm when overcooked, so avoid long reheating and add fresh lemon after warming.
What To Serve With This In The Air Fryer
Keep the meal keto with air fryer asparagus, zucchini, cauliflower rice, or Brussels sprouts. A crisp green salad with lemon dressing balances the Cajun heat without adding carbs.
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