How to Make It
In a large bowl, combine the buttermilk, hot sauce, and 2 teaspoons each salt and black pepper. Add the chicken, turn to coat, cover, and refrigerate, turning occasionally, for at least 2 hours and up to 1 day.
Meanwhile, in a second large bowl, whisk together the lemon juice, olive oil, sugar, and ¼ teaspoon each salt and black pepper. Add the kale and cabbage and toss to combine. Let sit, tossing occasionally, for at least 30 minutes and up to 1 hour.
Heat 1 inch of the canola oil in a large Dutch oven until the temperature reaches 325° F on a deep-fry thermometer. In a shallow bowl, combine the flour and cayenne. Remove the chicken from the marinade (shaking off any excess) and coat with the flour mixture.
Working in batches, fry the chicken, turning often, until golden brown and cooked through, 12 to 15 minutes. Drain on a wire rack or paper towel-lined plate; season with ½ teaspoon salt. Serve with the slaw, corn bread, and hot sauce.