Ingredients
Equipment
Method
- Prep: Pat fish dry. Season both sides generously with Spanglish Asadero Beef Birria Seasoning. Drizzle with lime juice and let sit 5–10 minutes. Prepare mango salsa and other toppings.
- Melt ½ cup butter in a large cast iron skillet over medium-high heat until foaming and hot.
- Add seasoned fish fillets. Pan-sear 3–4 minutes per side (depending on thickness) until golden crust forms and fish flakes easily. Add remaining butter as needed for basting. Remove from skillet and flake or slice into taco-size pieces.
- Warm corn tortillas in the same skillet or directly over flame until soft and lightly charred.
- Assemble: Layer flaked fish on warm tortillas. Top with mango salsa, crema, avocado slices, and shredded lettuce.
- Serve immediately with extra lime wedges.
- PRO TIPS & DIAL-INS
- Seasoning note: Spanglish Asadero Beef Birria Seasoning gives deep chili-garlic flavor that works surprisingly well on fish — start with 2 tbsp and add more for bolder birria taste.
- Crispy crust: Make sure skillet and butter are very hot before adding fish. Don’t move fillets for the first 2–3 minutes.
- Fish choice: Halibut holds up best for searing; cod is more delicate and cooks faster.
- Make-ahead: Prep mango salsa and toppings up to 2 hours ahead. Sear fish right before serving.
- Heat level: Add diced jalapeño to mango salsa if you want extra kick.
Nutrition
Notes
- Hot pan, don't rush it — Get the cast iron and butter fully hot before the fillets go in. If the butter isn't foaming, wait. A cool pan produces steam instead of a sear — you lose the crust and the color.
- Don't move the fish for two minutes — Once it hits the pan, leave it. The fillet will release naturally when a crust forms. If it sticks when you try to flip, it's not ready. Moving it early tears the crust and breaks the fillet.
- Halibut vs. cod — Halibut is denser and holds up better to a hard sear; cod is more delicate and cooks faster. With cod, check at three minutes per side. With halibut, four is the target.
- Season up, not down — Birria seasoning on fish is counterintuitive, so the temptation is to go light. Start with 2 tbsp and add more for bolder flavor. The mango salsa can take it.
- Prep the salsa first — Mango salsa holds well for up to two hours. Get it done before you start the fish so you're not rushing toppings while the cast iron is hot.
- Warm tortillas in the same pan — After you pull the fish, the pan has birria-seasoned butter in it. Warm your corn tortillas directly in that fat. Thirty seconds per side. Worth it.
- Layer the flaked fish on warm corn tortillas and build from there — mango salsa first, then crema, avocado slices, shredded lettuce last so it stays crisp. The sequence keeps everything fresh through the first bite.
- A side of Mexican rice and black beans rounds this into a full plate without adding much prep time. Serve with extra lime wedges — the lime lifts everything.
- Set the toppings out separately and let people build their own. The fish, the salsa, and the crema are the essential components; the rest is preference.
- Store leftover fish in an airtight container in the refrigerator for up to three days. Keep mango salsa, avocado, lettuce, and crema separate — assembled tacos don't hold, and avocado oxidizes fast.
- Reheat the fish in a skillet over medium heat with a splash of water or broth to keep it from drying out. Microwave covered on medium power works in a pinch — high heat overcooks the fish and dulls the seasoning.
- Build the tacos fresh after reheating. Tortillas warm quickly in a dry skillet or directly over a flame.