Marinate chicken in buttermilk for at least 15 minutes.
Mix flour, cornstarch, salt, pepper, paprika, garlic powder, and cayenne in a bowl.
Dredge marinated chicken in flour mixture until fully coated.
Heat oil in a deep pan over medium heat.
Fry chicken for 6–8 minutes per side until golden brown and cooked through.
Warm biscuits according to package or recipe instructions.
Mix honey, hot sauce, and melted butter to make hot honey.
Place fried chicken inside each biscuit.
Drizzle generously with hot honey and serve immediately.