Slow Cooker Buffalo Chicken Sandwiches with Ranch Fried Pickles

boneless skinless chicken breasts, frozen

bottle of your favorite hot sauce (I love Franks), divided

packet dry ranch seasoning

butter

Toasted Onion Rolls/Hamburger Buns

slices cheese (I used Gouda and also love Cheddar on it!) optional

Blue Cheese Dressing, optional for garnish

Ranch Fried Pickles HERE ), optional for garnish