1 heaping c. flour
1/3 c. sugar
1/2 c. butter, softened
1 egg yolk
1/2 tsp. vanilla extract
Jam, preserves or marmalade

Preheat oven to 350 degrees.

Mix flour, sugar and butter to a crumbly, pie crust type consistency. Add egg yolk, vanilla and mix thoroughly. Form into a ball and chill until firm enough to handle easily.

With floured hands shape into tiny balls and place on greased cookie sheet 1 inch apart. With thumb, make an indentation in center of each cookie. Fill with jam, marmalade or favorite preserves. Bake for 15 minutes until golden. Allow to cool thoroughly and store in airtight container.