Add ½ tablespoon butter to a skillet on medium-high heat. Once hot, sear the filets 4-5 minutes.
Carefully flip, add the remaining butter, and cook an additional 4-5 minutes more or until it reaches an internal temperature of 145°F.
Transfer to 2 plates and serve garnish as desired.
Video
Notes
Don't Overcook the Cod: Keep an eye on the cod while it cooks to avoid overcooking, which can result in dry and tough fish. Cod cooks quickly, so it's best to err on the side of caution and check for doneness after a few minutes on each side.
Baked Blackened Cod: You can bake the cod in the oven if you prefer. Place the seasoned cod fillets on a baking sheet lined with parchment paper and bake at 400°F for 10-12 minutes, or until cooked through.
Customize the Seasoning: Feel free to adjust the amount and type of seasoning according to your personal preferences. A homemade blackened seasoning blend you can make
Fish Varieties: Salmon, tilapia, or flounder can also be used in this dish. Keep in mind you may need less/more cook time. The safe internal temperature of fish that should be reached is 145°F.
Using Frozen Fish: Thaw frozen filets completely, then remove as much moisture as possible. Sometimes frozen varieties can leach out additional liquid, which can alter the consistency of cooked fish consistency.
Storage: While it is possible to freeze cod, this dish is best served fresh from the skillet. You can store leftovers in an airtight container in the refrigerator for 2-3 days.