Roll out the mixture on a clean, flat surface. The mixture should be about half a cm thick once rolled.
Using your cookie cutter, cut out the biscuit shapes until all the mixture is used up.
Place the shapes on a Pyrex Magic baking tray and bake for 10 minutes at 180 degrees until golden.
Remove from the oven and allow to cool.
Place 10 x heaped tbsp of white icing sugar in a bowl and add a few drops of water. Stir until it forms a thick, white paste, adding more water as required. If it becomes too watery, just add more icing sugar.
Spoon 1 tbsp of the icing mixture on to half of each biscuit. Allow it to dry and then add a 2nd layer. If you wish, a 3rd layer of icing can be added if you would like the white colour to be more dense.
Use red & green icing pens to draw on the berry and holly design.