Zwarte Kip is an advocaat, a thick and creamy eggnog flavored liqueur. It is made by mixing 1/2 Advocaat or eggnog and 1/2 Brandy. Just a small advocaat with cream on Sundays and holidays. Kerzhakov decided to leave Zenit after his relationship with Advocaat deteriorated. Advocaat, who struggled with the job's intensity, left after one season. Two theories have been put out on the origins of "advocaat".