Wash, stalk and stone the cherries. Melt butter. Separate eggs. Mix flour, vanillin sugar, 30 g sugar, baking powder and salt in a bowl. Mix egg yolks and milk and add to the flour mixture.
Work into a smooth mixture with the whisk of the hand mixer. Stir in butter. Beat the egg white with the whisk of the hand mixer until stiff, sprinkle in 20 g sugar. Fold the beaten egg whites into the mixture.
Place half of the cherries in a greased baking dish (approx. 1.5-2 litres capacity). Add the egg mixture and spread the remaining cherries on top. Casserole in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: see
producer) ica. Bake for 10 minutes, then lower the temperature by 25° C and bake for another 15 minutes. If the surface becomes too dark, cover with aluminium foil. Remove the casserole from the oven, let it cool down for about 10 minutes, dust with icing sugar and serve.