Preheat oven 450 (I used convection roast setting.)
Heat cast iron skillet and then add oil, heating it for 3 mins on medium high.
Season both sides of the breasts with salt/pepperm paprika and garlic.
Add them to the skillet, skin side down and cook 5 mins without disturbing. This will create the fabulous sear.
Flip chicken, remove pan from heat and add the butter. Drizzle some of the melted butter over the chicken using a spoon and place skillet in oven.
Cook 8-11 mins until internal temp is 165. Mine were done in 8 mins on the convection roast setting.
Place chicken on a plate and loosely cover with foil for 5 mins. Drizzle melted butter leftc in pan over the chicken and slice.