Marinate chicken in buttermilk for at least 1 hour.
Create a breading station with flour, eggs, and a mix of salt and pepper.
Dip marinated chicken in flour, then eggs, then flour again.
Fry breaded chicken in hot vegetable oil until golden brown.
Make the sauce by mixing mayonnaise, ketchup, Worcestershire sauce, garlic powder, and paprika.
Serve the chicken fingers with the homemade sauce.