Bring the cream, vanilla sugar, sugar and butter or margarine to the boil while stirring and then allow to cool completely.
Mix in the remaining ingredients.
Line a baking sheet with baking paper and spread the mixture about 1/2 cm thick in a circle (about 5-6 cm in diameter) on the baking paper. Place a cranberry in the middle of each Florentine.
Bake in a preheated oven at 175-180 ° C for 10-15 minutes.
Cool on the wire rack (smooth surface facing down).
Melt the couverture in a water bath and brush with light or dark couverture from below.