Optical cookies @_@

Few days ago I entered a bakery with my kids and Kid1 fell in love with those cookies...

 We bought a bounce of them and as all Tea Pastries they were hard and dry. The bought ones were good to deep them in a hot cup of tea, but Kid1 wanted to munch biscuits easily so decided to bake them :P I opted for this recipe right for crumbly cookies:

350 gr Flour

125 gr Powder sugar

200 gr Butter

1 Egg and 1 Yolk

1  1/2 tsp Baking powder

1 pinch Salt

20 gr dark Cocoa powder

Mix all ingredients, except Cocoa powder, as fast as possible (Same procedure for short pastry) than divide the dough in two parts. With the first part form a ball and let it rest in the fridge, than take the remaining and add Cocoa powder. Form a second ball an put it in the fridge as well. After one hour the smooth past will be hard enough to roll the dough in two square (one black and one white :P).

Carefully roll one square on a rolling pin and set it over the other, now roll the two layers forming a log. Press lightly, than slice the log into 5mm large wheels. Cook the biscuits on a baking pan using paper foil.  180°C for 10 minutes.