This helps the sugar dissolve and butter soften, and forms a light base for the cookies.
The dough is relatively crumbly, but bring it together with your hands then chill in fridge.
Take small pieces of the dough and form them into small crescent shapes with your hands.
Lay all of the cookies on a lined cookie sheet. Bake until they look dry but are not yet browning,
Combine vanilla sugar and powdered sugar to give an aromatic dusting. Sift it over the cookies while still warm so it sticks.
Perfect to enjoy during the festive season (or whenever you want to make an excuse!)