This is a bit of a cheat’s éclair. Normally they are filled with a crème pâtissière, but here I use whipped cream with Carnation caramel, which comes in a tin and is like dulce de leche. It’s so easy to whip up, and tastes delicious, so I don’t see why not. They’re traditionally topped with chocolate glacé icing, but I think chocolate ganache is far more delicious, if a little more rustic-looking. You will need a piping bag and round nozzle. (