Melt the butter. Finely crumble the speculoos and brown cake and knead with the butter. Put the crumbs into a springform pan (24 cm Ø) and press them evenly onto the base. Put them in a cold place. Soak gelatine in cold water.
Mix mascarpone, quark, sugar, vanillin sugar, lemon juice and cinnamon. Squeeze the gelatine, dissolve over low heat. Stir 3 tablespoons of mascarpone cream into the gelatine. Then stir the gelatine into the rest of the mascarpone cream. Whip cream until stiff and stir into the cream. Spread the cream on the cake base and smooth it down. Press in dents with a tablespoon. Refrigerate for another 2-3 hours. Knead marzipan with icing sugar. Colour 1/3 of the marzipan with food colouring.
Press in dents with a tablespoon. Refrigerate for another 2-3 hours. Knead marzipan with icing sugar. Colour 1/3 of the marzipan with food colouring. Roll out marzipan and cut out white and red stars. Sprinkle with cinnamon and sugar. Put the stars on the cake and sprinkle with some cinnamon and sugar