In a medium-size bowl, combine the softened butter with the salt, pepper, and garlic. Set aside.
Flip the chicken breast-side down. Using kitchen scissors, cut out the backbone of the chicken. Next, make a shallow slice down the back of the breast bone (this will help the chicken "open up").
Flip the chicken over and turn the legs inward. Using your hands, press the breasts down to lay the chicken flat (you might hear a slight crack and that's a good thing).
Carefully pull the skin away from the meat around the breast area.
Spread the butter mixture all over the chicken, reserving a bit to stuff underneath the skin.
Place the chicken in a baking pan or cast-iron skillet. Bake the chicken at 450°F uncovered for about 50 minutes or until internal temperature reaches 165°F. Let chicken rest for 10 minutes before cutting into it. Enjoy!