Mother's Scotch Shortbread (Christmas)

      2 c  Flour
    1/4 ts Salt
    1/4 ts Baking powder
    1/2 c  Powdered sugar
      1 c  Butter
 
     Oven 325~.
  
     Mix butter and sugar until creamy.  Add sifted dry ingredients. Chill
  until easy to handle.  Roll out to 1/4" thickness on lightly-floured board
  or wax paper. Cut into desired shapes (I have a bird cutter and Christmas
  tree).  Bake on ungreased sheet at 325~ for 10 to 15 minutes. Cookies may
  be sprinkled with colored sugars before baking, if desired.

mealsteps.com