Pan-Seared Fish Tacos with Avocado Crema and Pickled Red Onions

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

Lightly spiced white fish pan-seared and served in corn tortillas with creamy avocado crema and tangy pickled red onions for a refreshing Cinco de Mayo dish. This mexican-inspired seafood ready in about 25 minutes pairs white fish fillets (cod or tilapia), olive oil, ground cumin for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 280 calories and feeds 4, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 15 min Cook: 10 min Serves 4 Mexican cuisine 280 cal/serving
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Ingredients

Instructions

  1. Step 1: Combine 1/2 cup white vinegar, 1/2 cup water, and 1 tsp sugar in a bowl. Add 1/2 medium thinly sliced red onion and let sit at room temperature for at least 30 minutes to pickle.
  2. Step 2: In a small bowl, blend 1 medium ripe avocado, 1/4 cup sour cream, 2 tbsp lime juice, and 2 tbsp chopped fresh cilantro until smooth and creamy. Season with a pinch of salt.
  3. Step 3: Pat dry 1 lb white fish fillets and season evenly with 1 tsp ground cumin, 1 tsp chili powder, 3/4 tsp salt, and 1/2 tsp black pepper.
  4. Step 4: Heat 2 tbsp olive oil in a large skillet over medium-high heat. Add fish fillets and cook for 3-4 minutes per side until opaque and flaky.
  5. Step 5: Warm 8 corn tortillas in a dry skillet or microwave until soft and pliable.
  6. Step 6: Assemble tacos by placing pieces of seared fish on each tortilla, topping with 1-2 tbsp avocado crema and pickled red onions. Garnish with extra cilantro if desired and serve immediately.

Frequently asked questions

How long does Pan-Seared Fish Tacos with Avocado Crema and Pickled Red Onions take to make?

Total time is about 25 minutes (15 min prep + 10 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.

How do I store leftover Pan-Seared Fish Tacos with Avocado Crema and Pickled Red Onions?

Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep olive oil from drying out.

Can I substitute ingredients in Pan-Seared Fish Tacos with Avocado Crema and Pickled Red Onions?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Pan-Seared Fish Tacos with Avocado Crema and Pickled Red Onions for a different number of people?

The recipe is written for 4 servings. Multiply each ingredient by (your serving target / 4). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

What goes well with Pan-Seared Fish Tacos with Avocado Crema and Pickled Red Onions?

Mexican seafood like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.

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