Make a shortcrust pastry from the first 4 ingredients and put it in the refrigerator for about an hour. Then cut out hearts, circles or similar and place on a prepared baking sheet.
Beat the egg whites for about 10 minutes, then add the powdered sugar and stir for at least 15 minutes. This is particularly important, as otherwise the egg white will melt! Now use a star cover to squirt small drops all around the biscuits.
Bake in a hot oven at approx. 160 ° C for approx. 12-14 minutes.
Then heat the jam and pour it in the middle.
The cookies can be stored in tins. Also in 2 layers, then simply put a layer of baking paper in between.