Oh yum. I remember these from donkey's years ago & have always been tempted to make them. Might have to have a go when I have time & deserve a treat.

Definitely no treat, I just remember the taste, shape & maybe a swirl of cream in the centre. Mostly the moist texture of the sponge. Yum.
Bonne Maman make them, I've tried them in Waitrose, but the rum part of them just tastes far too sweet & artificial. Shame I was so looking forward to them when I saw them in store.