
Lime cordial is a sweetened lime concentrate made from lime juice, sugar and water, used to add both sweetness and lime flavor in one go.
Sweetened, preserved lime with a rounder, slightly cooked citrus flavor. Gin is the traditional base, since gin and cordial is a Gimlet, and vodka works the same way. Elsewhere it is often a small accent. It brings its own sugar, so measure it as a sweetener; a recipe using it rarely needs other syrup.
Fresh lime juice and 2:1 sugar syrup
Start with 5 ml of each for every 20 ml of cordial, then taste, since cordials vary a lot in sugar and acid. The drink comes out a little shorter, and fresher and sharper than with the bottle.
Lime syrup
Add fresh lime juice to taste to bring back the sourness.
Sealed at room temperature for months, refrigerated once open. It is a preserved product and does not go off quickly, but the aroma flattens with time and an old bottle tastes mostly of sugar.
Southern / Louisiana-style whisky liqueur, Triple sec