A chocolate bar is a confection in bar form comprising some or all of the following components: cocoa solids, cocoa butter, sugar, milk. The relative presence or absence of these components form the subclasses of dark chocolate, milk chocolate, and white chocolate. In addition to these main ingredients, it may contain emulsifiers such as soy lecithin and flavors such as vanilla.
A candy bar (called a chocolate bar in British English, Australian English and Canadian English, where the word candy refers specifically to sugar candy) is a form of confectionery usually packaged in a bar or log form, often coated with chocolate, and sized as a snack for one person. But within that term, a wide variety of products exist, ranging from solid chocolate bars to multiple layerings or mixtures of ingredients such as nuts, fruit, caramel or fondant.
Certain brands of chocolate bars are made for nutritional supplementation purposes. These bars contain protein and various vitamins while still retaining a sweet taste. The PowerBar brand candy bars would fit into this category.
Although chocolate bars and candy bars had their beginnings in the 19th century, it was in the early-20th century that this confectionery commercial venture grew most rapidly. The first wrapped chocolate bar was sold in 1910 by the Ganong Brothers company in Canada. A number of the bars developed then still exist in relatively unchanged form. In the U.S., most candy bars started out priced at ten cents, down to five cents during the Great Depression, and back to ten after World War II. This price remained stable until the late 1960s.
During the first half of the 20th century in the U.S., there were thousands of different candy bars being manufactured and distributed locally or regionally by small candy companies. Some of these still survive, but a few major manufacturers have taken over the marketplace, buying up smaller companies and reproducing the most popular of their candy bars. Today candy bars are made and consumed all over the world, and manufactured to local tastes and environmental conditions.