The Border Table · Source Edition

Classic Beef Fajitas

Name: Classic Beef Fajitas
Prep time: 4 h 30 min
Cook time: 20 min
Yield: 4 servings
Cuisine: Tex-Mex
Ingredients: 2 whole skirt-steak strips, enough to serve four (roughly 1½–2 pounds total is a buying guide; sizes vary); Juice of 2 large limes (roughly ¼ cup; size varies); Kosher salt and freshly ground black pepper, to taste. For about 2 pounds of steak, start with approximately 1 teaspoon kosher salt and ½ teaspoon pepper; adjust for your steak and salt brand.; 8–12 small, thin flour tortillas, warmed; Optional: pico de gallo, guacamole, chopped white onion, chopped cilantro, and lime wedges, each served separately

Two large limes, salt, pepper, and a fiercely hot mesquite grill give whole skirt-steak strips their charred edges. Slice across the grain and let everyone build their own fajitas.

Juicy sliced skirt steak with lightly charred edges on a dark platter, with thin flour tortillas, pico de gallo, guacamole, onion, cilantro, lime, and a little mesquite wood behind it. — AI-generated editorial image of the finished serving idea, not a photograph of a kitchen test.

EditionOwner's Source Edition

Serves4

Time4 hours marinating · about 30 minutes draining · about 5 hours total with grilling and rest

EquipmentVery hot grill, tongs, food thermometer, clean platter

The idea

This is the simple skirt-steak fajita method our founder remembers enjoying in Pharr, Texas. It uses lime, salt, and pepper rather than a long spice blend. Mesquite is the preferred fire. It is a personal recipe and memory, not a claim to reproduce the Round-Up restaurant's formula.

Cook it

Marinate. Trim away any tough outer membrane, if needed. Leave the skirt steak in whole strips. Pat dry, season both sides with salt and pepper, then add the lime juice and turn to coat. Cover and refrigerate for 4 hours.
Drain and heat the grill. Remove the strips from the marinade and discard the liquid that touched raw beef. Set steak on a clean rack or tray for about 30 minutes to let excess moisture drain while a very hot fire is prepared. This does not mean the center must reach room temperature. Mesquite is preferred; a very hot gas grill also works. Keep a cooler area available.
Grill. Place the strips close to the heat and turn once. Begin checking after roughly 2–3 minutes per side. Aim for a few charred edges, not an all-over burnt crust. Thickness and fire vary: use a thermometer in the thickest part. The FoodSafety.gov safe minimum for whole beef steaks is 145°F (63°C), followed by at least a 3-minute rest. Move to the cooler zone if the exterior browns too fast.
Rest and slice. Transfer the steak to a clean platter and rest 15 minutes. Cut thin slices across the visible long fibers; spoon the clean resting juices over the meat.
Serve. Warm the flour tortillas just until soft and flexible. Set out the steak, tortillas, and optional toppings in separate dishes so everyone can season and garnish their own fajitas.

If something goes wrong

If the steak seems wet, give it more time to drain and pat its surface dry before grilling. If the outside chars before the center reaches temperature, shift it to the cooler part of the grill. If the sliced steak feels chewy, check that you cut across—not along—the long muscle fibers.

Keep it safe

Marinate in the refrigerator. Discard marinade that touched raw meat. Use a clean platter for cooked steak. Refrigerate leftovers within 2 hours, or within 1 hour when the temperature is above 90°F (32°C).

Understand it

A drier surface browns faster over fierce heat. Slicing across skirt steak's pronounced grain shortens the muscle fibers in each bite. The remembered 2–3 minutes per side is a first check, not a guaranteed safe endpoint; thickness, fire, and a thermometer decide when it is done.

Know it

Our founder remembers a similar straightforward fajita style from visits to the Round-Up in Pharr, Texas, with his grandfather. That is a firsthand recollection, not a documented restaurant recipe. Read more in our fajitas guide.

Source and care notes

The two strips, two large limes, four-hour marinade, mesquite preference, 15-minute rest, and four servings come from the founder's account. The approximate shopping weight, starter seasoning measures, and tortilla count are editorial guides and have not been independently kitchen-tested. Food-safety guidance: FoodSafety.gov safe minimum temperatures and FoodSafety.gov four steps to food safety.