Preheat oven to 400°F. Line a rimmed baking sheet with aluminum foil or parchment paper for easy cleanup, if desired.
Lightly pound the chicken breasts to uniform thickness (about ½-inch). You can skip this step if you’re starting with chicken cutlets (thinly-sliced chicken breast).
Pat the chicken dry; season liberally with salt on both sides. Sprinkle the cornstarch over both sides of the chicken and pat to coat evenly.
In a large, shallow dish, combine breadcrumbs, Corn Flake crumbs, brown sugar, cayenne, paprika, onion powder, garlic powder, cumin, and salt. Drizzle with oil and mash with a fork until the oil is thoroughly incorporated.
In another shallow dish, lightly beat the egg, buttermilk, and hot sauce with a fork until combined.
Dip the chicken into the egg mixture, then press into the breading mixture until evenly coated on both sides. (Discard leftover mixture.)
Place the chicken on the prepared baking sheet. Bake until the chicken is golden brown and the meat reaches an internal temperature of 165°F, about 15 minutes. You do not need to flip the chicken halfway through.
Place two slices of white bread on each individual plate. Top with chicken, dust with additional cayenne or paprika if desired, and serve with plenty of pickles. Garnish with additional hot sauce to taste.