I loove kaya buns esp when they are done well. And this one was satisfying! A thin 'skin' of crispness outside, with a fluffy, chewy interior. The sweet coffee taste in the bun is distinct, but I wished it was a kopi kosong bun. Kaya ratio is optimal for the bun, and there's a big slab of cold butter which I thought was too much but it turned out to be an appropriate amount.