The Elderflower Rickey: A Sour in a Tall Glass Wearing a Sundress

You build this one in the glass. No shaker, no theater. Fill a highball with good cubed ice, the kind that's cold and dense and won't dissolve into your drink in four minutes, then pour the gin, the St-Germain, and the fresh lime straight down on top. Fresh lime is the whole game here. Bottled lime juice tastes like a chemistry experiment and there is no amount of elderflower that will hide it. Add the soda last, gently, so you keep the carbonation that does half the work. A quick lift with a barspoon to integrate, never a stir that flattens the fizz. The St-Germain is the variable you watch. It carries sugar, so it doubles as your sweetener, which means there's no simple syrup in here at all. The soda stretches everything long and keeps the proof civilized. Garnish with a lime wheel and a cucumber slice, and for once the cucumber earns its keep by echoing the green melon note hiding in the elderflower.

Here's the part nobody tells you. Built tall in a highball, fronted by gin, this thing reads like a cousin of the Tom Collins, but it doesn't belong there. It belongs to the Sidecar family. Look at the bones. You have a complete sour already standing on its own legs, gin plus lime plus the sugar living inside the St-Germain, and then you have a liqueur poured in at a structural dose, three-quarters of an ounce, sitting at or below the base spirit. That liqueur is doing more than flavoring. It is defining the drink. When a liqueur steps in to provide the sweet side of a sour and stamps its own character on the whole glass, you are drinking a daisy, and the daisy is pure Sidecar logic. The soda is just a long pour of dilution, the same move that turns a sour into something you can drink in the sun. It puts the Rickey in the same room as the Bramble, the Cable Car, the Aviation, and the Cadillac Margarita, all of them sours with a liqueur calling the shots.

The Rickey is old Washington, D.C. bar history, a Gilded Age refresher built on spirit, lime, and soda, named for a lobbyist named Joe Rickey who liked his without sugar. The original was an honest, austere thing, basically a highball that respected your liver. The elderflower version is a modern graft, and it arrived on the back of St-Germain's mid-2000s takeover, when the bottle landed in America wrapped in that ornate art-nouveau packaging and bartenders started calling it bartender's ketchup because it made everything taste vaguely good and vaguely the same. That reputation is unfair to the liqueur and fair to the people who abused it. Elderflower is a strange, fleeting, slightly tropical flower note that goes pear and lychee and white grape all at once, and it can absolutely run a drink instead of just decorating one. The Rickey is where it gets to do that. The austerity of the original keeps the sweetness in check, the lime keeps it from going floral and cloying, and the result is a drink that tastes like a garden in June without tasting like a candle shop. Order it when it's too hot to think and you want something that won't put you under the table.