
Apricot brandy liqueur is a sweetened fruit liqueur flavoured with apricot flesh and kernels, not a distilled apricot spirit despite the word "brandy" in its name.
Ripe apricot fruit dominates, backed by heavy sweetness; when kernels are used, a faint almond-like bitterness threads underneath.
Poured in small measures, it works as a flavouring modifier that carries both apricot aroma and a substantial load of sugar, so it must be balanced as a sweetener rather than treated as a dry fruit spirit. As the dominant flavour of a drink it defines the fruit character and cannot be swapped out.
As a small flavouring accent, another apricot-forward sweetener stands in — its sweetness can be rebalanced with sugar syrup and its strength topped up with a neutral or grape spirit — but apricot aroma is the ingredient's identity and cannot be reconstructed from an unrelated fruit; a noyau/kernel liqueur only approximates the almond facet and shifts the balance toward nut.
Apricot eau-de-vie / distilled apricot brandy (fruit spirit)
The eau-de-vie is a dry, unsweetened spirit distilled from fermented apricot juice/mash; the liqueur is a sweetened, lower-strength infusion. They share the name 'apricot brandy' but are different products.
US 'flavored brandy' (apricot flavored brandy)
In the US, 'apricot brandy' as a flavored brandy denotes a grape-brandy base bottled at not less than 35% ABV, whereas the cocktail liqueur is sweeter, often neutral-spirit based, and lower strength.
Creme de noyau/noyaux
Creme de noyau is built primarily around stone-fruit kernels (almond-like flavour) rather than apricot flesh; apricot brandy liqueur leads with apricot fruit, with kernel notes secondary if present.
Producers macerate or infuse apricots — the flesh, the kernels, or both — in spirit, sometimes distil the infusion, then sweeten it with sugar. The base alcohol varies: some makers use neutral spirit, some grape brandy, and some a blend of the two. Where kernels feature in the flavouring, they add an almond-like noyau note alongside the fruit.

Northern Sunset
Dry sparkling wine

Angel Face
London dry gin, Apricot brandy liqueur, Calvados

Charlie Chaplin
Apricot brandy liqueur, Sloe gin

New York Stone Sour
Bourbon

Peach and Apricot Spritz
Prosecco extra dry, Peach schnapps, Apricot brandy liqueur

Stone Sour
Bourbon

Apricot Julep
Bourbon

Apricot Stone Sour
Apricot brandy liqueur

Dot (1937 recipe)
London dry gin

Fifth Avenue Shot
Brown crème de cacao, Apricot brandy liqueur

Smoked Maple
Peated single malt whisky

Toreador
Tequila blanco

Valencia Cocktail
Apricot brandy liqueur

Webster
London dry gin

Coronation Cocktail (Old Waldorf-Astorias recipe)
Calvados

Cuban Cocktail No. 3
Light gold rum

Paradise – IBA
London dry gin