Mahi Mahi tacos are a flavorful, fun and fast dinner that is perfect for Taco Tuesday, or any night you need a fast meal.
Place the fish onto a clean plate and lightly pat it with a clean paper towel.
Make the spice blend. Combine the garlic powder, onion powder, paprika, oregano, chili powder, salt and pepper in a small bowl and mix to combine.
Liberally season both sides of each filet with the spice blend.
Place a cast iron pan over medium-high heat and add butter and oil. Once the butter and oil is nice and hot, add the seasoned fish in a single layer into the bottom of the pan. If your pan is too small to fit all four filets, then do this in batches. Cook, for several minutes, until golden brown on one side. Try not to touch them as they cook. Use a fish spatula or metal spatula to carefully flip the fish over and continue to cook until opaque and completely cooked through, about 3-4 minutes.