(1). In a medium bowl, cream together butter and sugar. Beat in egg yolks, stir in milk. Combine flour, cinnamon, baking powder and salt, stir into wet ingredients until well blended. Wrap dough and chill for a minimum of 2 hours.
(2). Preheat oven to 350 degrees F (175 degrees C).
(3). On a lightly floured surface, roll dough to 1/4″ thickness. Use any size cookie cutter to make the desired shapes. Place cookies 1″ apart onto a cookie sheet.
(4). Bake for 10 to 12 minutes, until lightly browned. Remove cookies to wire racks and cool.