Preheat the oven to 200 °, drain the sour cherries.
Melt the butter with the chocolate in a hot water bath and let it cool down again.
Mix the eggs with sugar, vanilla sugar and sour cream and add the chocolate butter. Sieve the flour, baking powder and salt over the chocolate mass and stir gently. Mix in the cherries.
Fill the molds and bake for 20-25 minutes.
After a short cooling time, take it out of the baking pan.
Cut off the muffle lid and drizzle with the kirsch. Whip the cream with the cream stabilizer and apply between the two pieces of muffin and on top.