Mix crème fraîche, lemon juice and vanilla sugar. Separate the eggs. Mix flour, milk, egg yolk, sugar and salt with the whisk of the hand mixer to a smooth dough. Beat the egg whites until stiff and fold into the dough.
Heat the fat in a frying pan and bake 4 thick pancakes one after the other on medium heat for 1-2 minutes on each side until golden brown. Pluck the pancakes in the pan with two forks into bite-sized pieces and bake for another 1 minute.
Remove the pancake from the pan, dust with icing sugar and serve on a plate with cranberries and a Klechs crème fraîche. Serve the rest of the cranberries separately. Decorate with mint as desired.