Paper wrapped cake
紙包蛋糕, paper-wrapped cake, 纸包蛋糕
Small chiffon cakes or sponge cakes baked in paper wrappers, similar in size to cupcakes
Recipes

Cake Wrapped in Paper (Hong Kong Cupcakes) | Christine's Recipes: Easy Chinese Recipes | Delicious Recipes
I used to go to an old café with my father to have afternoon tea when I was a little kid. The café was very cozy and would sell freshly baked cakes and breads around 3 to 4pm. Although the café was not big, their cakes baked in paper (纸包蛋糕) was very popular...

Hong Kong Paper Wrapped Sponge Cake (香港古早味纸包鸡蛋糕) - Guai Shu Shu
INTRODUCTION I do not think I should be overly particular about the look of these paper wrapped cakes. It did have some shrinkages but it is not very obvious and when I Google images, apparently, shrinkages are common for this cake. I have prepared...