This is a recipe from a magazine clipping, date unknown but I would guess the later part of the 20th century. Magazine unknown.

SANDKAKER (Sand Cookies)

3/4 cup powdered sugar
1/2 cup butter or margarine, softened
1 egg yolk
1 cup all-purpose flour
1/3 cup finely chopped almonds
1/8 teaspoon ground cardamom

In mixer bowl, cream powdered sugar and butter or margarine till light and fluffy. Beat in egg yolk. Stir together flour, nuts, and cardamom. Blend into creamed mixture. Pinch off a small ball (about 2 1/2 teaspoons) of dough; place in center of a 2 1/2-inch sand cookie mold or tiny foilware cup. With thumb, press dough evenly and very thinly over bottom and up sides. Place molds on cookie sheet. Bake in 350° oven for 12 to 15 minutes or till lightly browned. Cool. To remove, invert molds and tap lightly. If desired, fill tarts with jam or jelly. Makes 2 1/2 dozen cookies.