Preheat oven to hot (400°); place butter in a 9 by 13-inch baking pan in oven until butter is melted.
Remove pan from oven.
Meanwhile, beat milk with egg.
Dip chicken pieces into egg mixture.
Then coat chicken with a mixture of flour, baking powder, garlic salt, ginger, cayenne, and walnuts.
Place chicken, skin side down, in butter.
Bake in the preheated oven for 30 minutes; turn and bake 20 minutes longer or until chicken is tender and well browned.