Make a shortcrust pastry from the first 6 ingredients, divide into two parts and refrigerate.
Mix the ingredients for the filling until you have a smooth, spreadable mixture. Roll out the shortcrust pastry (possibly between cling film) and coat each with half of the mixture. Roll them together and bend them into a wreath. Bake on a greased baking sheet in a preheated oven at 180 ° C for about 45 minutes. Serve dusted with powdered sugar.