How To Make Nashville Hot Chicken

t sauce) 1 cup buttermilk 1 egg 8 pieces chicken (e.g drumstick, thigh etc.) 200g salted butter (melted) 2 tbsp cayenne pepper 1 tsp sweet paprika 1/2 tsp black pepper 1 tsp garlic powder 1 tsp onion powder 1 tbsp brown sugar 2.5 cups plain flour + 1 tbsp salt