Pat the chicken breasts dry and season both sides with salt, then coat evenly with cornstarch, garlic powder, smoked paprika, and black pepper.
Heat avocado oil in a large skillet over medium-high heat until shimmering.
Add the chicken breasts and cook for 5 to 6 minutes per side until golden brown and the internal temperature reaches 165°F / 74°C at the thickest part.
Transfer to a wire rack and rest for 5 minutes before slicing.
Serve with your favorite sauce, over salad, in wraps, or alongside rice bowls.