Prepare the Marinade: In a large bowl, whisk together the buttermilk and the egg. Add the chicken drumsticks, ensuring they are fully submerged. Cover and refrigerate for at least 30 minutes, or preferably 2-4 hours, to tenderize and flavor the chicken.
Make the Dry Dredge: In a separate large, shallow dish, combine the all-purpose flour, smoked paprika, garlic powder, onion powder, dried oregano, black pepper, 1 teaspoon salt, and cayenne pepper (if using). Whisk well to ensure all spices are evenly distributed.
Coat the Chicken: Remove the chicken drumsticks from the buttermilk mixture, allowing any excess to drip off slightly. Dredge each drumstick thoroughly in the seasoned flour mixture, pressing firmly to ensure the flour adheres to all surfaces. For an extra crispy crust, you can dip the floured drumstick back into the buttermilk briefly, then dredge it again in the flour. Place coated drumsticks on a wire rack while you heat the oil.
Heat the Oil: Pour the vegetable oil into a large, heavy-bottomed pot or Dutch oven, ensuring it’s at least 2-3 inches deep. Heat the oil over medium-high heat until it reaches 350°F (175°C). Use a kitchen thermometer to monitor the temperature for best results.
