01 - Preheat your oven to 425°F. Line two baking sheets with parchment paper.
02 - In a large bowl, toss the shredded chicken with chili powder, cumin, garlic powder, salt, and black pepper until well combined.
03 - Lay 4 tortillas flat on a work surface. Evenly distribute the seasoned chicken, cheese, bell pepper, and green onions over each tortilla, leaving a 1/2-inch border around the edges.
04 - Top with the remaining 4 tortillas and press gently to seal the edges.
05 - Brush both sides of each quesadilla with melted butter or olive oil.
06 - Place quesadillas on the prepared baking sheets. Bake for 8-10 minutes, flip, and bake another 7-8 minutes until golden and crisp.
07 - Let cool for 2 minutes, then cut into wedges. Serve warm with salsa, sour cream, or guacamole.