Make these Whole30 Sheet Pan Steak Fajitas and you’ll have dinner made in a snap with hardly any clean up! They’re made with skirt steak, bell peppers, red onions, and homemade fajita seasoning. Serve with lettuce wraps and some avocado and you’ve got yourself a healthy, low carb dinner in under 20 minutes!
🎉 Sheet Pan Meals are the BEST
One pan meals = less dishes = less work. Yup, I’m totally cool with that. That’s why I love recipes like my Butterfly Chicken or my Salmon & Brussels Sprouts. Everything is cooked together so life is easier!
I whipped up these Whole30 Sheet Pan Steak Fajitas in a jiffy today and was done in about 20 minutes flat, which works perrrrfectly with my Tuesday afternoon attitude. I remember the days I used to love spending an hour or more making dinner, glass of wine in hand, and it was a relaxing, winding-down ritual. Ha.
Nowadays, my husband works 12 hours days and I’ve been stuck home struggling to squeeze work in between diaper changes, so by 5pm I’m all about that quick dinner and get ’em to bed hustle.
The faster the better, because we’ve GOT to tuck these kids in for the night or momma’s gonna lose her mind. But I digress. Sheet Pan Steak Fajitas (did I mention they’re low carb, too?) were a lifesaver! See more of my quick dinners over on my Instagram feed.
- Skirt Steak. Alternately, you can use a top steak or flank steak.
- Fajita seasoning. Make your own homemade fajita seasoning or use your favorite store-bought blend.
- Bell Peppers
- Red Onions
- Oil. Avocado or olive oil are my preference, but any Whole30 compatible oil will work!
🥑 What to serve with steak fajitas
- Lettuce wraps
- Coconut Cauliflower Rice
- Corn Salsa (this is NOT Whole30 compatible but I do make it when I’m off round!)
- Homemade Air Fryer Tortilla Chips (also NOT Whole30 compatible but my kids love it!)
All of these ingredients are optional. I think they all add a little extra oomph to your fajitas, so feel free to choose any or all that you like!
💡 Recipe Tips
- Get your sheet pan really, really hot, before you ever put the meat on it. Set your broiler on, place the sheet pan about 3-4 inches from it, and let it get hot. When you place the steak on the pan and spread the peppers and onions around, you should hear a good sizzle.
- This meal cooks quickly, especially if you have a good stove and broiler (I don’t) so stay close and watch closely. Some of it depends on the cut of steak you’re using. I chose a top sirloin steak today, because it’s what I had in the fridge.
- You can use flank OR skirt steak. Whatever cut you choose, remember to let your beef come to room temp before cooking, and once it’s cooked, always let it rest before you slice it.
⏱️ To make in advance
To make dinnertime even faster and easier, I sometimes prep this meal ahead of time, then just heat the sheet pan and cook everything when we’re ready to eat. I’ve even cooked this entire meal ahead of time, then returned everything to the sheet pan, covered it and refrigerated it.
Once we’re ready to eat, I lightly broil everything again just before I serve it. Since the steaks are sliced so thinly, it’s totally fine (in my opinion) to broil them gently again, and honestly, I’m not always going for absolute perfection. It still tastes pretty amazing, though.
Okay, now let’s get to the recipe! If you like this one, be sure to drop a star rating below!
Sheet Pan Steak Fajitas
- 1 lb top sirloin, flank, or skirt steak
- 1 large red onion
- 3 bell peppers
- 3 Tablespoon avocado oil divided
- 1-2 Tablespoon fajita seasoning (see below)
- 10-12 lettuce leaves
- 1-2 avocados
- 1 lime sliced
- 1 small bunch cilantro
- 1 cup cauliflower rice
Fajita Seasoning Blend
- 2 teaspoons chili powder
- 1.5 teaspoons cumin
- 1 teaspoons salt
- 1/4 teaspoons oregano
- 1/2 teaspoons garlic powder
- 1/2 teaspoons onion powder
- 1/4 teaspoons paprika
- pinch cayenne optional
- Preheat your broiler to the highest setting. Move the rack to the top and place your sheet pan on it.
- While the broiler and sheet pan heat up, prep the vegetables: Quarter the red onion and slice the bell peppers into 1/4 inch slices, removing the stem and seeds. Place them in a large bowl and toss everything with 2 tbsp oil and 1/2-1 tbsp fajita seasoning.
- Pat the steaks dry. Drizzle with 1 tbsp oil and season with taco seasoning.
Cook the Dish
- Once the broiler and sheet pan are very hot, carefully remove the pan from the oven.
- Place the steaks on the pan and arrange the peppers and onions so they’re spread out as much as possible.
- Return the sheet pan to the broiler and cook for about 4 minutes. Flip the steaks and mix the peppers and onions.
- Cook for another 4 minutes or until the peppers and onions are beginning to brown but aren’t burnt.
- Allow the steaks to rest, then slice them thinly. Serve in lettuce cups with any combination of cilantro, slices of lime, avocado, and cauliflower rice.
Here’s another easy and absolutely delicious sheet pan meal! Whole30 Bruschetta Salmon is one of my all-time favorites, and SO easy!