Ingredients:

1/2 cup butter, softened

1/4 cup packed brown sugar

1 egg yolk (discarding the white or saving it for another use)

1/2 teaspoon vanilla

1 cup flour

2/3 cup jam

1/4 teaspoon salt

Directions:

Preheat oven to 350. Grease cookie sheet. Cream butter, sugar and egg yolk . Add vanilla, flour and salt and mix well. Shape dough into balls, place on cookie sheets 2 inches apart. Bake 5 minutes. Remove from oven, dent each cookie and fill with preserves. Bake for 8 additional minutes then remove to rack to cool.