Pineapple bun
The crust has a texture that is visually similar to a pineapple, however there isn't any pineapple in this bao
Source: Wikipedia
Recipes
Pineapple Buns (Bolo Bao) - Omnivore's Cookbook
Learn how to make Asian bakery style pineapple buns in your own kitchen. These buns are light, soft, and airy, with an extra crispy, buttery, and sugary crust that cracks perfectly into a pineapple pattern. Detailed step-by-step pictures and video are...