Mix ingredients and chill for 1 hour; dough will be sticky. When ready to roll out dough, divide into 4 parts and roll out thin on very well floured board. Cut dough with small juice glass. Dip each side of circle into granulated sugar. Put on ungreased cookie sheet and bake at 190ºC or 7-9 minutes. Prick each one with fork when they begin to puff up. Let cool. Put filling in between 2 cookies and make into a sandwich type cookie.
Filling. Blend together ingredients until smooth.