To celebrate the 50th birthday of Wassenaar's most famous inhabitant, King Willem-Alexander, we produced a tasty orange coloured pilsner. Using Czech yeast and 5.0 grams of Kazbek hops per litre, we created a fruity bottom-fermented beer. During boiling and fermentation we used the peel of oranges as an extra twist. The orange peel added a surprising bitterness, but at the same time a wonderful aroma.