This recipe for rich chocolate mousse can be made with just three ingredients: milk, marshmallows, and chocolate bars. The process is simple: just heat the ingredients in a bowl in the microwave to melt and mix, then chill in the refrigerator until firm. It's perfect for beginners at baking. Despite not using eggs or cream, it has a smooth, melt-in-your-mouth texture. It's foolproof – just mix and chill – so please give it a try!