Step 1

Heat oven to 350°F.

Step 2

Mix brown sugar, shortening, butter, vanilla and egg yolk in medium bowl. Stir in flour and salt until dough holds together.

Step 3

Shape dough into 1-inch balls. Beat egg white slightly. Dip each ball into egg white. Roll in nuts. Place about 1 inch apart on ungreased cookie sheet. Press thumb deeply in center of each.

Step 4

Bake about 10 minutes or until light brown. Immediately remove from cookie sheet to wire rack. Cool completely, about 30 minutes. Fill thumbprints with jelly.