Sift and mix all dry ingredients of the dough. Add the egg and cold butter and knead quickly to form a smooth dough. Then roll it out on a baking sheet and brush with the apricot jam.
For the topping, slowly heat the butter together with the sugar, vanilla sugar and water in a saucepan and melt it, then fold in the nuts or grated coconut. Bring to the boil briefly and let cool down a little. Distribute the mixture evenly on the dough.
Bake in a hot oven at 180 ° C top / bottom heat for about 30 to 35 minutes.
Tip: If you like, you can dip the corners in couverture after cooling.