Preheat your skillet or grill over medium heat.
Rub the chicken breasts with olive oil, then season with garlic powder, paprika, salt, and pepper.
Cook the chicken in the skillet for approximately 6-7 minutes per side, until fully cooked and the internal temperature reaches 165°F (75°C). Remove from heat and let rest for a few minutes.
While the chicken rests, lightly butter one side of each slice of bread.
On the non-buttered side of two slices, layer the cooked chicken, sliced avocado, and cheese.
Top with the remaining bread slices, buttered side facing out.
Place the sandwiches in the skillet over medium heat. Cook for 3-4 minutes on each side, or until the bread is golden brown and the cheese has melted.
Remove the sandwiches from the skillet, slice in half, and serve immediately. Enjoy your delicious Chicken Avocado Melt!