Grilled Tex-Mex Street Tacos with Pickled Onions

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

Tender grilled beef tucked inside warm corn tortillas, topped with tangy pickled red onions and fresh cilantro for an authentic street taco experience. This mexican-inspired tacos & burritos ready in about 55 minutes pairs flank steak, vegetable oil, ground cumin for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 320 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: 40 min Cook: 15 min Serves 4 Mexican cuisine 320 cal/serving
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Ingredients

Instructions

  1. Step 1: Thinly slice 1 medium red onion into rings and combine with 1/2 cup white vinegar, 1/2 cup water, and 1 tbsp granulated sugar in a small bowl. Stir until sugar dissolves and refrigerate for at least 30 minutes to pickle.
  2. Step 2: In a small bowl, mix 1 tsp ground cumin, 1 tsp chili powder, 1/2 tsp garlic powder, 1 tsp kosher salt, and 1/2 tsp black pepper. Rub the spice mix evenly over 1 lb flank steak.
  3. Step 3: Preheat grill to medium-high heat (about 450°F). Brush 1 lb flank steak with 2 tbsp vegetable oil and grill for 4-5 minutes per side until medium-rare. Remove and let rest for 5 minutes before slicing thinly against the grain.
  4. Step 4: Warm 8 small corn tortillas on the grill for about 30 seconds per side until pliable and slightly charred.
  5. Step 5: Assemble tacos by layering sliced steak, pickled red onions (drained), and 1/2 cup chopped fresh cilantro on each tortilla. Serve with 4 lime wedges for squeezing over the top.

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Frequently asked questions

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

Total time is about 55 minutes (40 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 Grilled Tex-Mex Street 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 Grilled Tex-Mex Street 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 Grilled Tex-Mex Street 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 Grilled Tex-Mex Street Tacos with Pickled Onions?

Mexican tacos & burritos 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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