Heat the oven to 180C (360F) and line two large baking sheets with baking paper.

In a bowl, add butter, sugar, eggs, vanilla and grated orange peel.

Beat with a mixer until you get a creamy texture.

Add the flour and mix until you get a crumbly dough.

Tear off a piece of the dough, approximately the size of a spoon.

Shape each piece into long and thin sticks, about 30 cm long.

Fold and twist them in a spiral shape. Place the formed cookieson the prepared baking trays.

Brush the cookies with milk and sprinkle with black sesame. Put in the oven for 25 minutes or until browned.