Definition of Truffle-

Chocolate truffles are a group of chocolate confectionery, traditionally made with a chocolate ganache center coated in chocolate or cocoa powder, usually in a spherical, conical or curved shape. Other fillings may replace the ganache: cream, melted chocolate, caramel, nuts, almonds, berries or other assorted sweet fruits, nougat, fudge or toffee, mint, chocolate chips, marshmallow and popularly liquor. They are named for their resemblance to the truffle fungus.