Add egg and vanilla and beat mixture. Fold in flour and salt. Knead dough until mixture forms a smooth ball.
Roll dough out and cut with round cookie cutter to about silver dollar size.
Place on ungreased cookie sheet and put trays in the fridge for 15 minutes.
Bake cookies for 10 minutes at 375°F. Cookie should not be brown.
After cooled, jam one side of each cookie and put another cookie on top.
Make powdered sugar icing by mixing powdered sugar with enough water to make a nice paste. Frost the top of each cookie and place 1/4 maraschino cherry in the center.