Source: Everyday Food-- breadcrumbs (enough to coat chicken)
Place chicken thighs and buttermilk into a dish (so buttermilk covers chicken) and marinate for at least 30 mins, but up to 8 hours. Then take each piece of chicken out, shake off the excess buttermilk, and coat with the breadcrumbs. Then place on a baking sheet and bake at 450 for 45 mins (or until chicken is cooked through). Then enjoy!