Knead the sugar with the butter. Add the flour, working the dough until compact.
Let the mixture rest in the refrigerator for 30 minutes.
Roll out the dough, lay on a baking sheet and prick the dough with a fork.
Spread the marmalade.
Bake, in preheated oven, at 180° C (350°F/gas 4) for 35 minutes.