Lightly beat softened butter and sugar until smooth; add eggs and vanilla. Mix. Add dry ingredients slowly, while mixing at low speed. Add white chocolate chips and raisins last, mixing till evenly combined. Roll into 1″ balls and place on lightly greased cookie sheets. Gently flatten. Bake at 350 for 10 minutes, or until lightly browned on the bottom and edges of cookies. Do not overbake!