01 - Preheat oven to 375°F. Lightly grease a 9x13-inch baking dish with cooking spray or a small amount of oil.
02 - In a large skillet, heat olive oil over medium heat. Add chopped onion and cook until softened, about 3 minutes. Add minced garlic and cook for 1 minute until fragrant.
03 - Stir in cumin, chili powder, smoked paprika, salt, and black pepper. Add diced tomatoes, black beans, and corn. Cook for 2 minutes to combine flavors, then add shredded chicken. Mix well to combine and heat through completely. Remove from heat.
04 - Spread 1/2 cup enchilada sauce evenly across the bottom of the prepared baking dish to prevent sticking.
05 - Wrap tortillas in a damp paper towel and microwave for 20 seconds to make them pliable and prevent cracking during rolling.
06 - Place approximately 1/3 cup chicken filling in the center of each warmed tortilla. Roll up tightly and place seam-side down in the baking dish, arranging them close together.
07 - Pour remaining enchilada sauce evenly over the rolled tortillas, covering completely. Sprinkle shredded Mexican cheese blend generously over the top.
08 - Bake uncovered for 20–25 minutes until cheese is fully melted, bubbly, and beginning to lightly brown on edges.
09 - Let enchiladas rest for 5 minutes to set before serving. Garnish with fresh chopped cilantro and thinly sliced jalapeño. Serve with sour cream on the side.