Follow these simple steps to create your crispy chicken sandwich:

1. Marinate Chicken: Place chicken breasts in a bowl and cover them with buttermilk. Allow to marinate for at least 30 minutes in the refrigerator.
2. Prepare Breading: In a shallow dish, combine flour, garlic powder, onion powder, paprika, cayenne pepper, salt, and pepper.
3. Heat Oil: In a large skillet, heat about 1 inch of vegetable oil over medium-high heat until it reaches 350°F (175°C).
4. Bread Chicken: Remove chicken from the buttermilk, allowing excess to drip off. Dredge in the flour mixture, ensuring an even coating. Shake off any excess flour.
5. Fry Chicken: Carefully place the breaded chicken into the hot oil. Fry for 6-8 minutes on each 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, remove the chicken and place it on a paper towel-lined plate to drain any excess oil.
7. Assemble Sandwich: Toast the burger buns lightly. On the bottom half, add lettuce, the crispy chicken, tomato slices, pickles, and your choice of sauce. Top with the other half of the bun.
8. Rest: Allow the sandwiches to rest for a few minutes before serving. This helps the flavors meld together.

By following these steps, you’ll create a crispy chicken sandwich that is both delicious and satisfying.