These delicious little, sticky, spongey, 'cake-lets' (Cannelés or Canelés), are flavoured with Rum and Vanilla, and are a speciality of Bordeaux.
They are not difficult to make, but you do need special moulds for them. Along with Madeleine moulds, I would suggest their moulds are indispensable in the well-equipped kitchen.
These particular Cannelés are probably the best I've ever tasted. They were a gift from a friend/neighbour, and came direct from Bordeaux itself.
If you see some on your next visit to France, I recommend. You can see they're good, just by looking at the picture.