Highly recommend the bombolone (large: $4.75) with custard. The texture of this doughnut is lovely with the crunch of the sugar on the outside, the tender but substantial dough, and the generous amount of smooth and rich vanilla custard with a hint of lemon. It's an expensive doughnut, but I would absolutely buy it again over any Jelly Modern and some Von Doughnut doughnuts.
I also tried the Nutella bombolone, which was tasty, but not as good as the one with pastry cream. I adore Nutella, which really says something about the bombolone with custard
Only downside was when I got there, they were out of the small size of their bomboloni.