These cookies are not only delicious at xmas time:
250 g soft butter
250 g sugar – beat thoroughly
add 1 egg – beat again thoroughly
add a dry mixture of 1/2 baking powder, 200 g cocos (ground), 250 g flour.
Make rolls of about 2.5 cm diameter (about 30 cm long so that you can easily handle). Let these harden in the fridge for a few hours or overnight. Cut slices about 1 cm thick. These slices will change shape while baking. Surely you can also make other shapes.
Bake at 185°C upper-lower heat for 12 minutes (until the edge is just a little brown).