My hubs bought a loaf of charcoal bamboo swiss roll cake from our favorite bakery the other day.  It didn’t really look appealing because of the blackish/grayish color of the cake but it tasted good!  Some ingredients used made the texture of the cake a little ‘crunchy’.  The cream you see in the middle is custard and it ain’t  very sweet.   There used to be a hype with charcoal bamboo bread last year and now there’s charcoal bamboo cake for health savvy cake lovers!  I will definitely buy this cake again.