Prepare meat. Arrange sirloin or chicken in the bottom of a crock pot. Sprinkle soup mix and ranch seasoning over top. Add pepperoncinis and brine. Distribute butter over the meat.
Cook in crockpot for 3-4 hours on high or 5-6 hours on low. Meat should pull apart easily.
Serve over rice or mashed potatoes, or your choice of side.