Tex Mex Chicken Fajita Foil Packets

Name: Tex Mex Chicken Fajita Foil Packets
Prep time: 15 min
Total time: 15 min
Cuisine: American, TexMex
Ingredients: 1 tbsp. chili powder; 2 tsp. sweet paprika; 1 1/4 tsp. kosher salt; 1 tsp. dried oregano; 3/4 tsp. garlic powder; 3/4 tsp. granulated sugar; 3/4 tsp. ground cumin; Cooking spray; 1 lb. Yukon Gold potatoes, scrubbed and sliced into 1/4"-thick half moons; 4 medium red and green bell peppers, stemmed, seeded, and thinly sliced; 1 medium red onion, thinly sliced; 1 1/2 lb. boneless skinless chicken thighs, cut into 1" to 2" chunks; 4 tbsp. butter; Warm flour tortillas, sour cream, shredded cheddar, sliced avocado, and lime wedges, for serving