Easy Grilled Steak Fajitas

After seasoning the steak and vegetables, you might have some spice mix leftover. You can use it to sprinkle on the fajitas before serving or keep it in the pantry. The spice mix is great on tacos and keeps well for three months in an airtight container.

  • Prep time: 10 minutes
  • Cook time: 10 minutes
  • Yield: Serves 4


Fajita Spice Mix:

  • 1 teaspoon kosher salt
  • 1/2 teaspoon black pepper
  • 1/2 teaspoon garlic powder
  • 1/2 teaspoon onion powder
  • 1/2 teaspoon ground cumin
  • 1/2 teaspoon chili powder

For the fajitas:

  • 1 1/2 pounds steak, skirt, flank, or strip (no more than 1-inch thick)
  • 1 large green pepper, sliced thin
  • 1 large red pepper, sliced thin
  • 1 medium sweet onion, sliced thin
  • 4 teaspoons olive oil
  • 10-12 medium flour tortillas

DAD ADD — Lime Cumin Sour Cream:

  • 1 cup sour cream
  • 1 lime, zest and juice
  • 1/2 teaspoon ground cumin
  • Pinch of salt

To serve:

  • Avocado
  • Salsa
  • Hot sauce


1 Make the fajita spice mix: In a small bowl combine kosher salt, black pepper, garlic powder, onion powder, cumin, and chili powder.

2 Make the vegetable foil pack: Fold a large piece of foil in half so you have a double layer. Add the sliced peppers and onions. Season the vegetables with 1 tablespoon of olive oil and sprinkle with 1 teaspoon fajita seasoning.

Fold the sides of the foil up and crimp it tightly on top to make a packet.

Foil with sliced onions, sliced peppers and steak covered in seasoning to make grilled steak foil packets.

3 Season the steak: Season the steak liberally with the seasoning mix (about 3/4 teaspoon per side).

A steak on a plate sprinkled with salt and pepper to make foil packets with steak.

4 Preheat your grill to 450°F for high heat grilling.

5 Grill the packet and the steak: Once the grill is hot, transfer the veggie packet and the steak to the grill. Grill over steak over high, direct heat. After 4 minutes, flip the steak and grill for 5 to 7 additional minutes.

This will finish cooking the steak to about a medium to medium-rare temperature and soften the veggies. Remove both the foil packet and the steak from the grill and let cool for a few minutes.

6 Make the Dad Add Lime Sour Cream (optional): In a small bowl, combine sour cream, zest, juice from 1 lime, cumin, and salt. Serve alongside the fajitas.

A glass dish with sour cream, lime zest, spices and sour cream.

7 Slice the steak: Slice the steak thinly against the grain.

8 Serve: You can add the steak to the veggies and serve the fajitas right out of the foil packet alongside a stack of flour tortillas. The foil should be strong enough, but if yours seems unstable, you can also transfer the ingredients to a serving platter.