marinate the chicken:
Place chicken thighs in a large disposable plastic storage bag.
Stir marinade and pour over chicken in storage bag. Marinate in refrigerator at least overnight.
cook the chicken:
Combine flour, paprika, sugar, salt and garlic powder in a large storage bag. Add chicken, one piece at the time, and shake until well coated. Place breaded chicken on a plate. Repeat with remaining chicken pieces.
Add butter to a large baking pan. Place in hot oven just until butter melts. Remove from oven.
Place breaded chicken pieces skin side down.
Cook in a preheated 425 degree oven for 30 minutes.
After 30 minutes, flip chicken and cook on other side for 30 minutes or until the internal temperature of the chicken reaches 165 degrees.
Drain on a wire rack for a few minutes. Serve hot, cold or at room temperature.