Preheat the oven at 180 degrees Celsius.
Place a baking paper in a oven form 25 x 25 cm.
In a casserole melt the butter and the white chocolate together. Take away the casserole from the stow and add the eggs, sugar and vanilla sugar and mix it all together.
Add the flour, almond powder and baking powder while stirring.
Pour the batter in the baking form, and spread evenly the berries on top of it.
Place in the middle of the oven for 25 minutes. Take the cake out and let it cool down.
Cut the brownie in squares.
Melt the white baking chocolate in a casserole and let it rest for 5 minutes. Sprinkle it evenly on the brownies.