Sheet-Pan Flank Steak Fajitas with Charred Peppers & Avocado Crema
Tuesdays are for zero fuss, big flavor, and minimal cleanup. I used to think good fajitas required a screaming hot cast-iron skillet and a smoke alarm going off in my tiny apartment. Then I discovered the magic of the oven broiler. Flank steak cooks like an absolute dream under high heat, and tossing it onto the same sheet pan with sweet peppers and onions gives you that authentic sizzle-platter flavor in under 20 minutes. This recipe is my weeknight salvation, born from countless nights when I wanted a great dinner but refused to spend the rest of the evening doing dishes. What makes this special is how the beef juices mingle with the charred edges of the peppers—pure magic. Wrap it all up in a warm tortilla and slather it with my ridiculously fast avocado crema. Yes, you can skip the cilantro if you're one of those people who thinks it tastes like soap. Want a shortcut? Use store-bought guacamole thinned with a squeeze of lime instead of making the crema from scratch. No judgment here. Delicious doesn't have to be difficult, and this sheet-pan wonder proves it every single time.
Featured Recipe
Sheet-Pan Flank Steak Fajitas with Charred Peppers & Avocado Crema
Tuesdays are for zero fuss, big flavor, and minimal cleanup. Flank steak cooks like a dream under a high heat broiler, and tossing it onto the same sheet pan with sweet peppers and onions gives you that sizzle-platter flavor in under 20 minutes. Wrap it all up with my ridiculously fast avocado crema for the ultimate weeknight win.
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Timeline
Ingredients
- 1.5 lbs flank steak(sliced thinly against the grain)
- 3 medium bell peppers(mixed colors (red, yellow, green), sliced into strips)
- 1 large red onion(sliced into half-inch wedges)
- 3 tbsp olive oil(divided)
- 2 tbsp lime juice(freshly squeezed)
- 1 tbsp chili powder
- 1 tsp ground cumin
- 1 tsp garlic powder
- 1 tsp smoked paprika
- 1.5 tsp kosher salt(divided)
- 0.5 tsp black pepper(divided)
- 1 medium ripe avocado
- 0.5 cup sour cream or Greek yogurt
- 8 small flour tortillas(warmed for serving)
- 0.25 cup fresh cilantro(chopped, optional for garnish)
Instructions
- 1
Position rack in the top third of your oven and preheat to 450°F (230°C).
5 min
Tip: Getting the oven blazing hot upfront ensures nice charred edges on the vegetables.
- 2
Place 3 medium bell peppers and 1 large red onion on a large rimmed sheet pan. Drizzle with 1.5 tbsp olive oil, season with 0.5 tsp kosher salt and 0.25 tsp black pepper, and toss directly on the pan to coat.
4 min
Tip: Don't bother dirtying a bowl for the veggies—toss them right on the sheet pan!
- 3
Transfer the sheet pan to the oven and roast the peppers and onions until they begin to soften.
8 min
Tip: Giving the veggies a head start ensures they get tender and caramelized without overcooking the steak later.
- 4
While the veggies roast, toss 1.5 lbs flank steak in a bowl with remaining 1.5 tbsp olive oil, 2 tbsp lime juice, 1 tbsp chili powder, 1 tsp ground cumin, 1 tsp garlic powder, 1 tsp smoked paprika, remaining 1 tsp kosher salt, and remaining 0.25 tsp black pepper.
4 min
Tip: Cutting against the grain breaks down muscle fibers, making every bite melt-in-your-mouth tender.
- 5
Mash 1 medium avocado with 0.5 cup sour cream or Greek yogurt and a generous pinch of salt in a small bowl until creamy.
3 min
Tip: This 2-ingredient sauce adds instant coolness and rich flavor to balance the smoky spices.
- 6
Turn your oven setting to High Broil. Remove the sheet pan, push the veggies toward the edges, and lay the seasoned 1.5 lbs flank steak in a single layer down the middle. Broil until the steak is browned and cooked to medium-rare.
5 min
Tip: Keep a close eye during broiling! High heat creates beautiful caramelized crispy bits fast.
- 7
Let rest for 3 minutes directly on the pan. Garnish with 0.25 cup fresh cilantro (if using), and serve hot with 8 small flour tortillas and the avocado crema.
3 min
Tip: Resting lets the juices redistribute into the steak so every tortilla is packed with flavor.
Chef's Notes
Shortcut alert: Grab pre-sliced bell peppers and onions from the produce aisle if you want to save yourself 5 minutes of chopping! If you prefer corn tortillas, wrap them in a damp paper towel and microwave for 30 seconds so they stay soft and pliable without tearing.
Elena Reyes
Delicious doesn't have to be difficult
I spent a decade in restaurant kitchens before my daughter was born and I realized I needed a different relationship with food. The 16-hour days had to end, but my love of cooking didn't. Now I'm obsessed with the puzzle of making genuinely good food achievable on a Tuesday night. No weird ingredients, no 47-step processes—just smart techniques and bold flavors that come together fast. Because life is too short for boring weeknight dinners.