Polish Tea Cakes

Directions

1. 1
   Cream butter and sugar until light.
2. 2
   Add egg yolk; mix well. Add flour, sifted with salt; mix.
3. 3
   Roll dough into small balls. Dip in unbeaten egg whites and roll in finely chopped nuts.
4. 4
   Place on buttered baking sheet; press down center of each with thimble. Bake in a 325° oven for 5 minutes.
5. 5
   Remove and press down again with thimble.
6. 6
   Return to oven for 10 to 15 minutes.
7. 7
   Remove and fill indentation with preserves or melted chocolate while still warm.