Are there other fruits that look like durian but are different inside? I once ate an odd fruit which grew on a Caribbean island. It had black seeds and creamy white flesh surrounding the seeds, was very sweet and not tart.
Thanks. That could be it, too. The description fits what I had.
It might be a cherimoya (although we spell it as chirimoya): https://en.wikipedia.org/wiki/Cherimoya -- the best fruit in the world in my opinion. It is sometimes referred to as custard apple in English.
cherimoya, atemoya, soursop... the description fits in Annona or Rollinia
There’s a fruit called seetafel (custard apple) that sounds very similar to this. It’s amazing!