This is an easy microwave recipe for gateau chocolat using chocolate bars and milk cocoa. Simply mix the ingredients and heat in the microwave to create a moist and rich gateau chocolat that's like ganache. It tastes even better if you chill it in the refrigerator overnight, allowing you to enjoy the rich chocolate flavor and moist texture. It's an easy recipe that even beginners can try, and it's perfect for a home café or as a gift.