Grand Marnier is a liqueur

Liqueur

A liqueur is an alcoholic beverage that has been flavored with fruit, herbs, nuts, spices, flowers, or cream and bottled with added sugar. Liqueurs are typically quite sweet; they are usually not aged for long but may have resting periods during their production to allow flavors to marry.The...

 created in 1880 by Alexandre Marnier-Lapostolle

Alexandre Marnier-Lapostolle

Alexandre Marnier-Lapostolle created Grand Marnier, an orange flavored cognac liqueur, in 1880. He learned how to distill from his father who was a wine and spirit merchant.-References:*...

. It is made from a blend of true cognac

Cognac (drink)

Cognac , named after the town of Cognac in France, is a variety of brandy. It is produced in the wine-growing region surrounding the town from which it takes its name, in the French Departements of Charente and Charente-Maritime....

s and distilled essence of bitter orange

Bitter orange

The name "bitter orange", also known as Seville orange, sour orange, bigarade orange, and marmalade orange, refers to a citrus tree and its fruit. Many varieties of bitter orange are used for their essential oil, which is used in perfume and as a flavoring...

. Grand Marnier is 40% alcohol (70 Proof

Proof (alcohol)

Alcohol proof is a measure of how much alcohol is contained in an alcoholic beverage. The term was originally used in the United Kingdom and was defined as 7/4 times the alcohol by volume . The UK now uses the abv standard instead of alcohol proof. In the United States, alcoholic proof is defined...

 in UK, 80 Proof in US). It is produced in several varieties, most of which can be consumed "neat" as a digestif and can be used in mixed drink

Mixed drink

A mixed drink is a beverage in which two or more ingredients are mixed. Some mixed drinks are alcoholic beverages that contain liquor; others are non-alcoholic.-Types:Some popular types of mixed drinks are:...

s and desserts. In France this kind of use is the most popular especially with Crêpes Suzette and "crêpes au Grand Marnier".