I think it split because you overbaked it. That's what is seems like from the cross-section view anyway (looks a bit curdled). Try 40 minutes in the oven next time.
Good recipe nonetheless, I never tried it with sour cream.
Thanks for the feedback 😀 yes definitely think 1hr in fan oven is too long. I will try the next one at 40 minutes
Cheesecake, my favourite dessert 🍰
Ditto. It's sooooo good. It's kinda like s*x and pizza. Even if it's bad, it's still pretty good.