A photo like it (Nashville hot chicken) · Southern Foodways Alliance / Amy C. Evans (CC BY 2.0) via Wikimedia Commons · source
Fried chicken painted while it's hot with a paste of cayenne, brown sugar and spices loosened with the frying fat itself. Served on white bread that soaks up the red oil, with pickle chips to cool you down.
1.2 kg (2 1/2 lb) bone-in chicken thighs and drumsticks (or 8 boneless thighs)
For the brine: 500 ml (2 cups) buttermilk, 2 tbsp hot sauce, 1 tbsp fine salt, 1 tsp cayenne
For the dredge: 250 g (2 cups) plain flour, 2 tsp fine salt, 2 tsp black pepper, 2 tsp paprika, 1 tsp garlic powder
About 2 liters (2 quarts) peanut oil or lard, for frying
For the hot paste: 2 to 4 tbsp cayenne (2 for medium, 4 for hot), 1 tbsp light brown sugar, 1 tsp smoked paprika, 1 tsp garlic powder, 1/2 tsp chilli powder, 1/2 tsp fine salt
To serve: 4 slices soft white bread, dill pickle chips
How to make it
Brine (8 to 24 hr): Mix the buttermilk, hot sauce, salt and cayenne, add the chicken and refrigerate overnight.
Dredge (10 min): Mix the dredge in a wide dish and work in 2 tbsp of the brine with your fingers for craggy bits. Coat each piece firmly, then rest on a rack 10 minutes.
Fry (12 to 15 min a batch): Heat 4 cm (1 1/2 in) oil in a heavy pot to 175°C (350°F). Fry 4 pieces at a time, holding the oil at 160°C (325°F), 12 to 15 minutes, turning halfway, until deep golden and 80°C (175°F) at the bone (boneless thighs take 7 to 8 minutes). Drain on a rack.
Make the paste (2 min): Put the cayenne, sugar and spices in a heatproof bowl. Carefully ladle in 120 ml (1/2 cup) of the hot frying oil and stir: it should sizzle and turn into a glossy red paste. Taste for salt.
Paint and serve (2 min): Brush the paste generously over every side of the hot chicken. Lay each piece on a slice of white bread and top with pickle chips. Eat at once, with plenty of napkins.
Tips
Start at 2 tablespoons of cayenne; you can always paint on more.
Wear gloves if you're handling a lot of cayenne, and don't touch your eyes.