Pralus owns a cacao plantation in Madagascar, ensuring the extraordinary quality of every bean that goes into his chocolate, which comes in “crus” (vintages), rather like wine. Choose between 18 lip-smacking types, each wrapped in colorful paper like exquisite parcels. Be sure to try the barre infernale—melt-in-your-mouth bars of dark chocolate–encased praline. And the pink-dotted Praluline is the most delicious buttery brioche you may ever taste.  A second boutique is at 44 rue Cler in the 7th arrondissement.