Which French cake, whose name means 'thousand layers,' is made of puff pastry and pastry cream?

Mille-feuille

While the name implies 1,000 layers, a traditional Mille-feuille actually consists of 729 layers of pastry separated by two layers of cream. This delicate structure is achieved through a repetitive folding process known as 'lamination,' which creates its signature flaky crunch.