Meaning: Chocolate mousse is so smooth and light that it practically melts as soon as you put it in your mouth.
Choice of Words: Chocolate mousse is a light and fluffy dessert made from chocolate. Melts means to become liquid. Mouth is the opening in the face through which food is taken in.
Alternative Expressions
Chocolate mousse dissolves on your tongue.
Meaning: This means that chocolate mousse is so delicate that it melts away on your tongue, leaving behind a rich chocolate flavor.
Choice of Words:Dissolves means to break down into a liquid, like sugar in water. Your tongue is the muscle in your mouth that helps you taste things.
Chocolate mousse vanishes in your mouth.
Meaning: This means that chocolate mousse is so light and airy that it seems to disappear in your mouth, leaving behind only a lingering chocolate taste.
Choice of Words:Vanishes means to disappear or become invisible. When something vanishes, it's like it was never there in the first place.