German distillers Berentzen know their apples. They're probably know their onions, too, but they don't make any drinks with them. They make drinks with apples, like this Appletini liqueur, because it sounds much more appetising than an Oniontini.
Tasting Note by The Chaps at Master of Malt
Obvious green apple sweetness with a touch of tart fruit, balanced by drying peppery juniper hints.