If your chicken breasts are thick, consider following my directions above to pound them to an even thickness.
Add the flour to a shallow dish. Season your chicken with sea salt and pepper on both sides.
Lightly coat chicken with flour on both sides by dipping it on each side then lightly shaking off any additional flour.
Melt the butter in a large skillet over medium heat. Add the chicken and sear on both sides until golden, 3 or 4 minutes on each side.
Set chicken aside on a plate.