1 c  Butter or margarine,

           -softened
    1/3 c  Confectioners' sugar

    1/4 c  Unsweetened cocoa

  1 1/2 c  Cake flour

-------------------------------MOCHA FILLING-------------------------------
      1 T  Butter or margarine

      1    Square unsweetened chocolate

      1 c  Confectioners' sugar

      1 t  Vanilla

      2 T  Hot coffee or water

  Preheat oven to 350'F.  Lightly grease cookie sheets or line with parchment
  paper. Beat 1 cup butter, confectioners' sugar and cocoa in large bowl
  until fluffy. Blend in cake flour until smooth. Shape dough into
  marble-size balls. (If dough is too soft to handle, cover and refrigerate
  until firm.) Place 2" apart on prepared cookie sheets. Press center of each
  ball with knuckle of finger to make indentation. Bake 10-12 minutes or
  until set. Remove to wire racks. Prepare Mocha Filling. While cookies are
  still warm, spoon about 1/2 teaspoonful filling into center of each.
  Makes about 5 dozen cookies.
  MOCHA FILLING: Melt 1 tablespoon butter and chocolate in small heavy
  saucepan over low heat; stir until melted. Blend in confectioners' sugar,
  vanilla and enough coffee to make a smooth filling.