Chartreuse (liqueur) was not a secret but well known. At the death of the pharmacist, his heirs returned the manuscript to the monks who had been back at the Monastery since 1816. In 1838, they developed Yellow Chartreuse, a sweeter version of the Green Chartreuse, 40% alcohol liqueur (80° proof). The monks were again expelled from the monastery following a French law in 1903, and their real property, including the distillery, was confiscated by the government. The monks took their secret recipe to their refuge in Tarragona, Catalonia, and began producing their liqueurs with the same label, but with an additional label
Chocolate liqueur as a subspecies of chocolate liquor. Chocolate liqueur can be consumed straight, as an after dinner drink rather than as aperitif. It is used in mixed drinks and in desserts, especially in dessert sauces, cakes, and truffles. A food writer notes that many recipes for chocolate truffle add a small amount of chocolate liqueur to melted chocolate, and warns that adding the liqueur often causes the chocolate to seize. One of the more unusual uses is in chocolate rolled fondant. Arguably the most controversial use may be in connection with a scandal concerning the provenance of certain 17th century bottles