Jam Thumbprints

Directions

1. 1
   Cream together butter and sugar until fluffy.
2. 2
   Add egg yolks, vanilla and salt.
3. 3
   Beat well.
4. 4
   Gradually add flour, mixing well. Shape into 3/4-inch balls.
5. 5
   Dip in slightly beaten egg whites, then roll in chopped walnuts.
6. 6
   Place 1-inch apart onto greased cookie sheet.
7. 7
   Press down center on each with thumb.
8. 8
   Bake at 350° for 15 to 17 minutes.
9. 9
   Cool slightly.
10. 10
    Remove from pan and cool on rack.
11. 11
    Just before serving, place jam in center of cookie.
12. 12
    Makes 3 dozen.