This cake is FAB! It was quite easy and came out really well. I found it very forgiving also: I only had three oranges, not four, and no buttermilk – because, you know, pandemic – and it was still great.
I used cream and lemon juice instead of buttermilk and I did up the amount of orange juice in my syrup to compensate for the lack of zest of one of the oranges. I also cut back the sugar to about 1 1/2 c which I thought was plenty.
Laziness prevented me from making the ganache, but frankly I didn’t think it needed it at all, just delicious, and keeping quite well also!