Okay kiddo, let me explain what London Fog is. It's a yummy drink that people like to order when they feel cold or just want something tasty. It's made with hot milk, a sweet vanilla flavoring, and Earl Grey tea.
So let's break it down even more. Hot milk means milk that has been warmed up, but not so hot that it will burn your tongue. Vanilla flavoring is something that makes the milk taste like a sweet dessert. Earl Grey tea is a fancy kind of tea that comes from England. It tastes like a mix of black tea and fragrant flowers.
When you put all these things together, you get a super delicious drink that tastes like a warm, sweet hug in a cup. Some people even like to add extra flavors, like caramel or honey, to make it even more special. Yum!