01 -
In a mixing bowl, blend chili powder, garlic powder, onion powder, crushed red pepper flakes, dried oregano, paprika, ground cumin, salt, and black pepper. Evenly coat both sides of each chicken breast with the spice mixture.
02 -
Preheat grill or grill pan to medium-high heat. Place seasoned chicken breasts on the grill and cook for 6 to 8 minutes per side, or until a food thermometer inserted in the thickest part registers 165°F. Remove from heat and allow to rest for several minutes before slicing.
03 -
In a medium saucepan, melt butter over medium heat. Whisk in the flour and cook for 1 to 2 minutes until the mixture is bubbly and fragrant. Slowly incorporate whole milk, whisking constantly to avoid lumps. Continue to cook and stir gently until the sauce thickens slightly without reaching a boil.
04 -
Reduce heat to low. Gradually whisk in shredded cheddar cheese until fully melted and velvety. Stir in cayenne pepper, paprika, and salt to taste, ensuring a smooth, homogenous sauce.
05 -
Slice the grilled chicken breasts. Arrange on serving plates and generously pour warm cheese sauce over the chicken. Serve immediately while hot.