Thumbprint Cookies

Directions

1. 1
   Heat oven to 350.
2. 2
   Mix throroughly butter, shortening, sugar, egg yolk, and vanilla.
3. 3
   Work in flour and salt until dough holds together.
4. 4
   (You may want to add a tiny bit of water if the dough seems dry; make a ball of dough-- if the dough cracks when you make your thumbprint, add a bit of water to soften the dough and prevent cracks.)
5. 5
   Shape dough into 1-inch balls.
6. 6
   Beat egg white slightly.
7. 7
   Dip each ball into egg white; roll in nuts.
8. 8
   Place 1-inch apart on ungreased baking sheets.
9. 9
   Press thumb deeply into center of each.
10. 10
    Bake about 10 minutes or until light brown.
11. 11
    Remove immediately from baking sheet; cool.
12. 12
    Fill thumbprint with jelly.