This is a recipe video for chocolate mousse that requires no oven or heavy cream and only three ingredients (marshmallows, milk, and pure cocoa). The process is simple: heat the marshmallows and milk in the microwave until melted and mixed, then combine with pure cocoa and mix well, and finally chill in the refrigerator until firm. It's perfect for beginners. Mixing with a whisk will give it a fluffier texture, resulting in a rich and delicious dessert that's perfect for Valentine's Day.