Springerle - cooking recipe

Ingredients

2 c. sugar, sifted
4 eggs, separated
1 cube ammonium carbonate
20 drops oil of anise
1 tsp. grated lemon rind
4 c. sifted all-purpose flour
anise seed

Preparation

Stir sugar into beaten egg yolks.
Beat whites until stiff, add to egg yolks and sugar.
Stir vigorously for 10 minutes.
Crush ammonium carbonate thoroughly and add to mixture, along with anise oil and lemon rind.
Add flour in several portions, combining well. Divide dough into 3 or 4 portions.
Turn one out onto floured board and place others in refrigerator.
Roll out 1/4-inch thick.
Dust springerle board with flour, by tying flour into a twist of cheesecloth and striking it lightly against the board.
Stamp sheet of dough firmly with the floured springerle board.