Smoky Grilled Beef Tacos with Pickled Red Onion

By AislePrompt Editorial · Published 2026-04-30 · Updated 2026-04-30

Juicy grilled beef slices seasoned with smoky spices, served in warm tortillas topped with tangy pickled red onions and fresh cilantro for a vibrant taco experience. This Mexican-inspired beef recipe, ready in about 35 minutes, pairs flank steak, smoked paprika, ground cumin for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 350 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.

Ingredients

• 1 lb flank steak
• 1 tsp smoked paprika
• 1 tsp ground cumin
• 1/2 tsp garlic powder
• 1 tsp sea salt
• 1/2 tsp black pepper
• 2 tbsp olive oil
• 8 small corn tortillas
• 1 small, thinly sliced red onion
• 1/2 cup white vinegar
• 1 tbsp sugar
• 1/4 cup, chopped cilantro leaves
• 4 lime wedges

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Instructions

1. Step 1: In a small bowl, combine 1 teaspoon smoked paprika, 1 teaspoon ground cumin, 1/2 teaspoon garlic powder, 1 teaspoon sea salt, and 1/2 teaspoon black pepper. Rub this spice mix evenly over 1 pound flank steak.
2. Step 2: Heat 2 tablespoons olive oil in a grill pan over medium-high heat until shimmering. Add the seasoned flank steak and grill for 4-5 minutes per side for medium rare, until nicely charred and cooked to your liking. Remove from heat and let rest for 10 minutes.
3. Step 3: Meanwhile, place 1 small thinly sliced red onion in a jar. Heat 1/2 cup white vinegar with 1 tablespoon sugar until sugar dissolves, then pour over the onions. Let them pickle for at least 15 minutes.
4. Step 4: Slice the rested steak thinly against the grain. Warm 8 small corn tortillas in a dry skillet for about 30 seconds per side until pliable.
5. Step 5: Assemble tacos by layering steak slices on each tortilla, topping with pickled red onions and chopped 1/4 cup cilantro leaves. Serve with 4 lime wedges to squeeze over.