[German] How to cook Marble cake (marmorkuchen)

Ingredients

• 2 tsp melted butter, for greasing
• ⅓ cup breadcrumbs
• icing sugar, for dusting

• 300 g unsalted butter, softened
• 280 g caster sugar
• 2 tsp vanilla sugar (see Note)
• 1 pinch salt
• 5 eggs
• 300 g (2 cups) plain flour
• 1 tsp baking powder
• 100 ml milk
• 60 ml (¼ cup) Advokaat

• 100 g dark chocolate

Directions