• Cake:

• Cream the eggs, sugar and vanilla sugar together until light and airy. 
• Mix the flour and baking powder and add it to the dough using a sieve to get rid of any clumps. 
• Melt the butter in a pot and add the milk.
• Fold in the melted butter and milk mixture into the dough. 
• Line a pan tall enough to include the topping 8x12 inches (22x32 cm) with parchment paper or coat it in butter and flour and pour in the dough. 
• Bake in a preheated oven at 350 F (175 C) for about 25-30 min. Make the topping while the cake is in the oven. 
• Take the cake out of the oven and turn the oven up to 440 F (225 C).
• Spread the topping over the cake. 
• Put the cake back in the oven and let it bake for 5 more minutes. 
• Let the cake cool before serving or storing it in an air-tight container for later use. 


Topping:

• Put the butter, coconut flour, brown sugar and milk in a pot and let it come to the boiling point while constantly stirring. 
• Immediately remove the pot from the heat once the mixture reaches the boiling point.
• Set aside until step 6 in the cake making is completed, then continue with step 7 of making the cake.