Pålægschokolade are thin slices of 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...

 (or vekao) that are used as a topping (in Danish, pålæg) on bread, such as rugbrød

Rugbrød

Rugbrød is a very commonly used bread in Denmark. The common rugbrød usually resembles a long brown rectangle, no more than 12 cm high, and 30–35 cm wide, although shapes and sizes may vary, as well as the ingredients...

 or white bread

White bread

White bread is made from wheat flour from which the bran and the germ have been removed through a process known as milling. Milling gives white flour a longer shelf life by removing the bran which contains oil, allowing products made with it, like white bread, the ability to survive storage and...

.
It is available in both light and dark chocolate, with the light variety being more common (the Danish confectionery Toms

Toms International

Toms International produces chocolate, liquorice and sugar confectionery in Denmark, Sweden and the United Kingdom. "Toms employs 1,200 - 1,700 employees depending on season and annually produces 50,000 tons of chocolate and sugar confectionery."...

 sells 70% light and 30 % dark).
Pålægschokolade is found primarily in Denmark

Denmark

Denmark is a Scandinavian country in Northern Europe. The countries of Denmark and Greenland, as well as the Faroe Islands, constitute the Kingdom of Denmark . It is the southernmost of the Nordic countries, southwest of Sweden and south of Norway, and bordered to the south by Germany. Denmark...

. In most other countries, Nutella

Nutella

Nutella is the brand name of a chocolate spread. Nutella, manufactured by the Italian company Ferrero, was introduced on the market in 1963. The recipe was developed from an earlier Ferrero spread released in 1944. Nutella is now sold in over 75 countries....

 and other chocolate spreads

Spread (food)

A spread is a food that is spread with a knife onto bread, crackers, or other bread products. Spreads are added to bread products to provide flavor and texture, and are an integral part of the dish, i.e. they should be distinguished from condiments, which are optional additions...

are more popular.
In recent years, organic varieties of pålægschokolade have been introduced into the market.