Crispy Chicken Burger

Name: Crispy Chicken Burger
Prep time: 20 min
Cook time: 12 min
Total time: 32 min
Cuisine: American
Ingredients: 2 large chicken breasts (sliced in half (see notes)); 1 cup buttermilk (see notes); 1 tsp salt; 1/4 tsp cracked pepper; 1/4 tsp garlic powder; 1/4 tsp onion powder; 1 1/2 cups cake flour (see notes); 1 tsp ground black pepper; 1/2 tsp garlic powder; 1/2 tsp onion powder; 1 tsp dried or fresh thyme (chopped); 1 tsp paprika; 1 tsp baking powder; 4 brioche buns; Butter lettuce (washed and dried); 1/4 red onion (thinly sliced); 1/4 cup mayonnaise; 1/4 cup BBQ sauce; 4 slices cheese (American, swiss or cheddar); Sweet pickles; 1 large tomato (thinly sliced); Vegetable oil for deep frying