Melt 100 g of chocolate, once melted add the butter in pieces, sugar, vanilla, and a pinch of salt, mix, add the eggs and mix again.
Sift the flour and cocoa and mix briefly until a nice shiny mass forms.
Pour into a square baking pan lined with baking paper.
Sprinkle the other 100 g of chocolate pieces on top.
Bake for 25-30 min in a preheated oven at 175 °C.
When you gently shake the baking pan, it may still seem a bit soft; this way, once cooled, it will still be deliciously runny and creamy.
Scoop 4 nice round scoops of vanilla ice cream, place them on a board with aluminum foil and let them firm up again in the freezer.
Once your brownie is completely cooled, cut 4 squares the same size as your ice cream scoop so that the scoops fit nicely on top.
Now whip the meringue: put the egg whites, fine sugar, and vinegar in a mixing bowl and whip for at least 10 min until very stiff egg white foam, sift the powdered sugar over it and whip briefly and firmly into the foam until the powdered sugar is nicely incorporated, put in a piping bag with a nozzle of your choice.
Take a piece of brownie, place a scoop of ice cream on top and pipe the meringue from bottom to top all around in the shape of a Christmas tree, burn around with a blowtorch, decorate with a sprig of holly and cranberry, place in the freezer and finish each piece step by step.
Just before serving, sprinkle some powdered sugar snow and enjoy a 'white X-mas'.