Season the Steak
Mix cumin, chili powder, garlic powder, salt, and pepper in a small bowl. Rub seasoning all over both sides of the steak.
Heat the Plancha or Skillet
Place a plancha or skillet over medium-high heat. Add oil and let it heat until shimmering (about 30 seconds).
Cook the Steak
Sear steak for 3–5 minutes on the first side, flip, and cook another 3–4 minutes. Aim for 135°F for medium-rare. Adjust time for preferred doneness.
Rest the Steak
Transfer steak to a cutting board and let rest for 5 minutes to retain juices.
Slice the Steak
Slice steak thinly against the grain for the most tender bite.
Warm the Tortillas
Heat tortillas on the plancha or skillet for 30 seconds per side. Alternatively, microwave with a damp towel or warm in foil in the oven.
Assemble the Tacos
Top warm tortillas with sliced steak and your favorite toppings. Finish with a squeeze of lime.