Ingredients
200 g / 7.0 oz butter, unsalted
300 g /10.5 oz pastry flour
100 g / 3.5 oz maltitol
40 g / 1.4 oz egg white
2g / 0.1 oz baking powder

Preparation
Mix butter and maltitol. Add slowly the egg white. Fold carefully sieved pastry flour and baking powder. Mix to a dough. Refrigerate. Roll the dough in a round circle and bake in the preheated oven at 210°C/410°F.