This is a simple yet rich chocolate mousse recipe, "Mousse au Chocolat," made with just water and chocolate. Using only simple ingredients—chocolate with 70% or more cocoa content and mineral water—you can enjoy an authentic taste. The process is simple: combine chopped chocolate with water, melt in a double boiler or microwave, then cool and stir in ice water until firm. The video compares making it with 66% cocoa couverture chocolate and commercially available 70% chocolate, examining the differences in texture and setting speed. Because it's so easy to make, it's perfect for a home café or for entertaining unexpected guests.