1. Preheat oven to 325 degrees. Butter should be somewhat soft. Chill in refrigerator if it’s too soft. Put butter in mixing bowl and beat until light. Gradually add sifted powdered sugar, beating until very creamy and light. Sift flour and fold into butter mixture.
  2. Knead lightly until smooth. (Don’t overdo it.) If your kitchen is hot, chill the dough in refrigerator for 1-2 hours.
  3. Roll pieces of dough into balls the size of walnuts and place on ungreased baking sheets. Flatten slightly. Flour hands lightly if necessary. Top each one with a slivered almond.
  4. Bake in the preheated oven for 20-25 minutes until very lightly golden. Cool on baking sheets.