For the whole wheat butter cookies, knead butter, sugar, egg whites and whole wheat flour into a shortcrust pastry and chill for about 2 hours. Roll out on flour, about 3 mm thick.
Cover one tray with circles and the second tray with circles that have a hole or a flower in the center.
Bake at 180 degrees for about 8 – 11 minutes until they have some color. Heat the jam and stick the cooled cookies together with it.