Heat the butter and oil in a large skillet over medium-high.
When the butter has completely melted and the oil is hot, add the chicken.
Let cook for 5-6 minutes until a nice black crust forms. Flip the chicken. Cook on the second side. At this point, the chicken should be fully cooked. If it is not cook until it reaches 160 on an internal thermometer.
Notes
Spice Level: This has some kick. If you want milder chicken cut the amount of cayenne pepper back to ¼-1/2 teaspoon or omit it entirely.