Line a baking tray (approx. 35 x 40 cm) with baking paper. Melt butter at low heat. Separate eggs. Beat the egg whites and 1 pinch of salt until stiff, adding 150 g sugar and vanillin sugar. Fold in the egg yolks one by one. Sift flour and baking powder on top and fold in. Carefully fold in butter. Spread on baking tray
Bake in the preheated oven (electric cooker: 200°C/circulating air: 175°C/gas: level 3) for approx. 12 minutes. Turn onto a damp tea towel and remove the baking paper immediately. Let it cool down
Roast the coconut chips in a pan without fat and let them cool down. Sprinkle sponge cake with liqueur, spread with jam and cut into cubes (approx. 3 x 3 cm)
Whip the cream until stiff, adding 1 tsp. sugar and sauce powder. Pour into a piping bag with a small star-shaped spout. Spray a vanilla cream tuff on each cube and decorate with coconut chips