Pour cream into a mixing bowl. Wash the cream cup, dry it and then use it as a measuring cup. Beat the cream, eggs, 1 cup of sugar, 1 packet of vanilla sugar and lemon zest until the sugar is dissolved. Mix flour and baking powder and stir in briefly
Put the dough on a greased fat pan (approx. 32 x 39 cm) and smooth it down. Bake in the preheated oven (electric cooker: 200 °C / convection oven: 175 °C / gas: level 3) for approx. 10 minutes
Simmer butter, milk, 1 cup of sugar and 1 packet of vanilla sugar while stirring until the sugar is dissolved. Fold in the almonds and let it cool down a bit. Spread the mixture evenly on the cake and bake at the same temperature for another 15 minutes. Remove the cake and let it cool down