
Mandarine Napoléon is a mandarin liqueur on a cognac base.
Giffard Mandarine
The closest substitute, poured in the same amount. It also features mandarin but lacks cognac and is slightly weaker.
Grand Marnier
The nearest match in style. It is an orange liqueur on a cognac base and takes the same measure. The citrus note turns to plain orange.
Cointreau or another triple sec
Pour the same amount. You lose the underlying cognac. To bring back some mandarin, add a strip of tangerine peel before mixing and strain it out.
The name sounds French, but the liqueur is Belgian in origin. Sicilian mandarin peel and the cognac base make it richer and rounder than a plain orange liqueur, and pricier.