The Glen Grant 21 Year Single Malt is a Scotch whisky that is aged for 21 years in oak casks. It has a rich and complex flavor profile with notes of citrus, honey, vanilla, and oak. The nose is full of dried fruits and spice, while the palate is smooth and creamy with hints of caramel and nuts. The finish is long and warming, with a touch of sweetness. This whisky is highly praised for its balance and depth of flavor, making it a favorite among whisky enthusiasts.