The Best Steak Fajitas

INGREDIENTS

For the Homemade Fajita Seasoning Blend

1 tbsp

cornstarch

2 tsp

chili powder

1 tsp

kosher salt

1 tsp

paprika

1/2 tsp

sugar

1/2

taspoon onion powder

1/2 tsp

ground cumin

1/4 tsp

garlic powder

1/4 tsp

cayenne pepper

For the Steak Fajitas

1 clove

garlic, minced

recipe Fajita seasoning (above)

1/4

cupplus 1 tablespoon olive oil, divided

1/4 cup

fresh cilantro leaves, chopped, plus more for serving

1 1/2 lb

hanger, skirt or flank steak, halved crosswise

2 tbsp

butter

sweet onion, halved and sliced vertically

1/2 tsp

kosher salt

1/2

red bell pepper, seeded and sliced into strips

1/2

orange bell pepper, seeded and sliced into strips

wedges of lime

avocado, pitted and smashed

warm flour tortillas