Pineapple cake is a traditional Taiwanese pastry that is a popular souvenir from Taipei. It is made with a buttery and crumbly pastry filled with sweet and tangy pineapple jam. The combination of the buttery pastry and the fruity filling creates a delightful treat. Pineapple cakes are often individually packaged, making them a convenient and delicious snack to enjoy on the go or to bring back home as a gift.