In a medium bowl, whisk together chicken stock, olive oil, and 1/4 cup Frank's Red Hot Sauce, and ranch seasoning mix.
Place the chicken in a quart-sized plastic bag and pour the marinade over top. Let the chicken marinate for 2 hours or overnight.
Remove from the bag and discard the marinade.
Heat the grill to medium-high and cook the chicken breasts for 5-6 minutes on each side or until the chicken has reached an internal temperature of 165 degrees Fahrenheit.
Let the cooked chicken breasts sit for 3-4 minutes to allow the juices to seal in.
While the chicken breasts are resting place the butter in a small bowl and melt in the microwave. Slowing whisk in the rest of the hot sauce. Then using a pastry brush, brush on the sauce to the cooked chicken breasts.
Serve with blue cheese or ranch dressing. Enjoy over salad, in a wrap, or in a roll.