Pat dry your chicken wings with a clean kitchen towel. They should be very dry or else they won't crispen later and the baking powder will turn out pastry.
Place wings in a mixing bowl and coat with baking powder. All wings should be well coated. You can add a pinch salt or black pepper too.
Prepare a broiler/roasting pan by placing a tray or griddle over it. That way the chicken will be able to dry on it during the roasting process and excess liquids will fall into the pan under the tray/grid.
Place and spread wings over the tray so that they all have space on it.
Place tray with chicken into the oven (3rd or center position in your oven) and roast for about 1 hour at 400 Fahrenheit/ 200 Celsius or until golden. Turn the chicken half way between the roasting period.
Take out chicken when done and place chicken imidiatly into a mixing bowl. Coat with your favorite wing sauce, so that wings are fully coated.