Pineapple cake (Chinese: 鳳梨酥; pinyin: fènɡ lí sū; Taiwanese Hokkien: 王梨酥 ông-lâi-so͘) is a sweet traditional Taiwanese pastry containing butter, flour, egg, sugar, and pineapple jam or slices.
Contemporary pineapple cake bakeries have created variations on the traditional pineapple cake. The filling may also incorporate preserved egg yolks or other dried fruits such as cranberries or strawberries.
Bakeries may also add winter melon to the pineapple jam. This practice was initially an effort to make the tart pineapple filling more palatable.However, in contemporary bakeries, adding winter melon to the filling may be seen as an indicator of lower quality.
The annual Taipei Pineapple Cake Cultural Festival often features a contest in which bakeries compete to create pineapple cakes that incorporate unconventional ingredients, such as rice or Taiwanese tea.