Sheet-Pan Flank Steak Fajitas with Charred Peppers & Avocado Crema

Name: Sheet-Pan Flank Steak Fajitas with Charred Peppers & Avocado Crema
Prep time: 10 min
Cook time: 13 min
Total time: 23 min
Yield: 4 servings
Ingredients: 1.5 lbs flank steak; 3 medium bell peppers; 1 large red onion; 3 tbsp olive oil; 2 tbsp lime juice; 1 tbsp chili powder; 1 tsp ground cumin; 1 tsp garlic powder; 1 tsp smoked paprika; 1.5 tsp kosher salt; 0.5 tsp black pepper; 1 medium ripe avocado; 0.5 cup sour cream or Greek yogurt; 8 small flour tortillas; 0.25 cup fresh cilantro

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.

Elena Reyes

August 25, 2026

Prep: 10 minutes

Cook: 13 minutes

easy

dinner

30-minute-mealsheet-pansteakfajitas+1

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Timeline

22 minutes

0m10m20m

Preheat Oven

Prep Vegetables

Roast Veggies

Season Steak

Make Crema

Broil Steak & Veggies

Rest & Serve

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.

Frequently Asked Questions

How long does Sheet-Pan Flank Steak Fajitas with Charred Peppers & Avocado Crema take to make?

Sheet-Pan Flank Steak Fajitas with Charred Peppers & Avocado Crema takes about 23 minutes total. That includes 10 minutes of prep and 13 minutes of cooking.

How many servings does this recipe make?

This recipe makes 4 servings.

What skill level is needed for Sheet-Pan Flank Steak Fajitas with Charred Peppers & Avocado Crema?

This recipe is rated easy — it's beginner-friendly and straightforward.

What ingredients do I need for Sheet-Pan Flank Steak Fajitas with Charred Peppers & Avocado Crema?

The main ingredients are: flank steak, bell peppers, red onion, olive oil, lime juice, chili powder, ground cumin, garlic powder, smoked paprika, kosher salt, black pepper, ripe avocado, sour cream or Greek yogurt, small flour tortillas, fresh cilantro.

What type of meal is Sheet-Pan Flank Steak Fajitas with Charred Peppers & Avocado Crema?

Sheet-Pan Flank Steak Fajitas with Charred Peppers & Avocado Crema is categorized as: dinner.

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