First, take the chicken and place it in a zip-top bag. Using a meat mallet, gently pound the chicken to a uniform thickness of about half an inch. This ensures even cooking and a juicy result. If your chicken breasts are thicker than one inch, slice them in half horizontally before pounding.
Next, in a pie plate, combine the flour, salt, and ground black pepper. Stir in about three tablespoons of buttermilk to create a shaggy coating that will cling to the chicken.
Transfer the remaining buttermilk to another pie plate. Pat the chicken dry, dip it into the buttermilk, and allow the excess to drip off.
Then, coat the chicken in the seasoned flour, shaking off any excess. Place the coated chicken on a wire rack and let it rest for about five minutes. This helps the coating adhere better during frying.
While the chicken is resting, heat vegetable oil in a heavy-bottomed pot until it reaches 350°F over medium-high heat. You want enough oil so that it’s about three inches deep.
Carefully place the chicken into the hot oil, two to three pieces at a time. Fry the chicken for four to five minutes, until the internal temperature reaches 165°F. If your chicken is on the larger side, you may need to cook it a bit longer.
Once the chicken is golden brown and cooked through, remove it from the oil and place it on a clean wire rack to drain excess oil.
To make the Buffalo sauce, combine the Worcestershire sauce, Frank’s Red Hot Sauce, and butter in a small saucepan over medium heat. Stir occasionally until the butter melts and the ingredients are well mixed.
Spread a small amount of softened butter on the inside of the hamburger buns. Place them under the broiler until they're golden brown, about one to two minutes.
Place the fried chicken into a bowl and drizzle the Buffalo sauce over it. Toss to ensure the chicken is well coated in the sauce.
To assemble your sandwiches, place each chicken breast on the bottom bun, add four pickle slices on top, and finish with the top bun. Serve immediately and enjoy!