Puff pastry
Make a dough with flour, water, salt, butter.
Let this rest for 30 minutes. Roll out the buttersheet till 1cm thick.
Cut the dough in 4 and fold in the buttersheet.
Give it 3x3 foldings (27 layers total), after every folding let it rest for 30 minutes.
Cut the puff pastry 0,5cm x 12cm.
Bake 160C for +- 18 minutes