Creating a Crispy Buttermilk Fried Chicken Sandwich is easy when you follow these simple steps:

1. Marinate the Chicken: In a bowl, combine the buttermilk and chicken thighs. Cover and refrigerate for at least 1 hour (or overnight for optimal flavor).
2. Prepare the Breading: In a separate bowl, mix the flour, paprika, garlic powder, onion powder, salt, black pepper, and cayenne pepper.
3. Heat the Oil: In a large skillet, heat about ½ inch of vegetable oil over medium heat until hot (around 350°F or 175°C).
4. Bread the Chicken: Remove the chicken from the buttermilk, allowing excess to drip off. Dredge each piece in the flour mixture, pressing gently to adhere.
5. Fry the Chicken: Carefully place the breaded chicken in the hot oil. Fry for about 5-7 minutes per side, or until golden brown and cooked through. Use a meat thermometer to ensure the internal temperature reaches 165°F (75°C).
6. Drain: Once cooked, transfer the chicken to a paper towel-lined plate to drain excess oil.
7. Toast the Buns: In the same skillet, lightly toast the hamburger buns until golden brown.
8. Assemble the Sandwich: On the bottom half of each bun, add a piece of fried chicken. Top with lettuce, tomato slices, pickles, and your sauce of choice. Place the top half of the bun on each sandwich.
9. Serve: Serve immediately while the chicken is hot and crispy.

These straightforward steps will guide you in creating an incredible sandwich that your family and friends will love.