Modeling chocolate is a chocolate paste made by melting chocolate

Chocolate

Chocolate is a raw or processed food produced from the seed of the tropical Theobroma cacao tree. Cacao has been cultivated for at least three millennia in Mexico, Central and South America. Its earliest documented use is around 1100 BC...

 and combining it with corn syrup

Corn syrup

Corn syrup is a food syrup, which is made from the starch of maize and contains varying amounts of maltose and higher oligosaccharides, depending on the grade. Corn syrup is used in foods to soften texture, add volume, prevent crystallization of sugar, and enhance flavor...

 and/or a simple syrup (made from table sugar and water). Primarily used by upscale cakemakers and patisseries to add decoration to cakes and pastries, modeling chocolate is formed into a variety of shapes and structures that cannot be easily accomplished with other softer edible materials such as buttercream frosting, marzipan

Marzipan

Marzipan is a confection consisting primarily of sugar and almond meal. Persipan is a similar, yet less expensive product, in which the almonds are replaced by apricot or peach kernels...

, or fondant

Fondant

Fondant is one of several kinds of icing-like substance used to decorate or sculpt pastries. The word, in French, means "melting", coming from the same root as "foundry" in English....

. Modeling chocolate can be made from white

White chocolate

White chocolate is a confectionery derivative of chocolate. It commonly consists of cocoa butter, sugar, milk solids and salt, and is characterized by a pale yellow or ivory appearance...

, dark, semi-sweet, or milk chocolate.