Double layer Chocolate Bar is a type of confectionery that consists of two layers of chocolate with a filling in between. The filling can be anything from caramel, nuts, or nougat to fruit or flavored creams. To make a double-layer chocolate bar, chocolate is melted and poured into a mold to create the bottom layer. The filling is then added on top of the first layer of chocolate, and another layer of melted chocolate is poured over the top to create the second layer.