Fastelavn is Denmark's version of Carnival, traditionally celebrated the Sunday before Lent. Fastelavnsboller are custard- or cream-filled buns. Fastelavn is also the day for "beating the cat out of the barrel". Though today, the barrel is filled with candy, the barrel used to house a real black cat. If you'd rather stick to the sweets, try this Fastelavn Buns recipe [Allrecipes.com].