In a small saucepan, combine the first nine ingredients. Bring to a boil; remove from the heat and set aside to cool.
Place turkey breast on a rack in a greased shallow roasting pan. Spoon some of the butter mixture over the top. Cover and bake at 325° for 1-1/4 to 1-3/4 hours or until a thermometer inserted in turkey reads 165°, basting occasionally with butter mixture.