Grand Marnier is a French orange liqueur based on cognac and sugar. Triple secs are liqueurs that are distilled, and then orange peels are added, which are macerated and impart flavor to the alcohol. One of these is Grand Marnier, created by Alexandre Marnier-Lapostolle in 1879. Oranges were a rare and exotic fruit at the time, and by blending them into a high-quality brandy, Marnier-Lapostolle was able to create a sustainable legacy. Alc.40%.