This are soft buns with yema filling. Warning: it's super sooo sweet but super sooo yummy!
And my officemate said you can only buy this in Cagayan de Oro. But surprise! Surprise! There is a kiosk in SM Makati every Friday and weekends that sell these buns. It's Php177.50 for the big box of 12 and Php90.00 for the small box of 6.
If you haven't tried it yet, I say GO, GO, Go tomorrow (Friday) at SM Makati!