👩‍🍳 How To Make Sheet Pan Beef Fajitas

Step 1 — Prepare The Oven And Pan

Preheat the oven to 400°F.

Line a large rimmed baking sheet with parchment paper or a silicone baking mat for easier cleanup.

💡 Quick Tip:
A crowded pan traps steam. Using a large sheet pan helps the vegetables roast properly instead of turning soft and watery.

Step 2 — Season The Steak And Vegetables

In a large bowl, combine:

• sliced flank steak
• peppers
• red onion
• olive oil
• cumin
• chili powder
• cayenne pepper
• red pepper flakes

Season generously with sea salt and black pepper.

Toss everything thoroughly until evenly coated.

💡 Quick Tip:
Make sure the onions and peppers are fully coated too. As they roast, they absorb all the seasoned juices from the steak.

Step 3 — Spread Everything Onto The Pan

Transfer the mixture onto the prepared baking sheet.

Spread everything into a relatively even layer so the hot air can circulate properly around the ingredients.

The edges of the peppers should have enough space to blister slightly while the steak browns.

Step 4 — Roast Until Sizzling

Roast for 15–20 minutes, stirring once halfway through cooking.

The steak should be cooked through while the peppers soften and the onions develop caramelized edges.

💡 Quick Tip:
For extra smoky flavor, switch the oven to broil for the final 1–2 minutes. Watch carefully so the steak does not overcook.

Step 5 — Finish And Serve

Remove the pan from the oven and immediately top with:

• fresh cilantro
• lime juice
• extra lime wedges

Serve hot with tortillas, rice bowls, or lettuce wraps.

For a fun Tex-Mex dinner spread, pair these fajitas alongside Crispy Wonton Chicken Tacos.