Tex-Mex Grilled Beef Tacos with Pickled Onions

By , Test Kitchen Director · Reviewed by AislePrompt Editorial · ·

Juicy grilled beef tacos topped with tangy pickled red onions, fresh cilantro, and a drizzle of lime crema for a vibrant Tex-Mex street food experience. This mexican-inspired beef ready in about 40 minutes pairs flank steak, olive oil, chili powder for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 400 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: 25 min Cook: 15 min Serves 4 Mexican cuisine 400 cal/serving
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Ingredients

Instructions

  1. Step 1: Prepare quick pickled onions by combining 1/2 cup white vinegar, 1/2 cup water, 1 tbsp sugar, and 1/2 tsp salt in a bowl. Stir until sugar dissolves, then add 1 medium thinly sliced red onion. Let sit at room temperature for at least 20 minutes.
  2. Step 2: In a small bowl, mix 2 tbsp olive oil, 1 tbsp chili powder, 1 tsp ground cumin, 1 tsp garlic powder, 1 tsp salt, and 1/2 tsp black pepper. Rub this spice mixture all over 1 lb flank steak evenly.
  3. Step 3: Preheat grill to medium-high heat (about 450°F). Grill the steak for 4-5 minutes per side for medium-rare, or until desired doneness. Let rest for 10 minutes, then slice thinly against the grain.
  4. Step 4: Warm 8 small corn tortillas on the grill for 30 seconds per side until pliable and lightly charred.
  5. Step 5: Mix 1/2 cup sour cream with 2 tbsp lime juice and a pinch of salt to make lime crema.
  6. Step 6: Assemble tacos by layering sliced steak on tortillas, topping with pickled onions, a drizzle of lime crema, and 1/4 cup chopped cilantro. Serve immediately.

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Frequently asked questions

How long does Tex-Mex Grilled Beef Tacos with Pickled Onions take to make?

Total time is about 40 minutes (25 min prep + 15 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 Tex-Mex Grilled Beef Tacos with Pickled 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 flank steak from drying out.

Can I substitute ingredients in Tex-Mex Grilled Beef Tacos with Pickled 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 Tex-Mex Grilled Beef Tacos with Pickled 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 Tex-Mex Grilled Beef Tacos with Pickled Onions?

Mexican beef 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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