
Maraschino cherries syrup is the sweet, red, cherry-and-almond sugar syrup that cocktail cherries are packed in — the liquid drained from the jar.
It adds sugar, red color and a cherry-almond note that plain cherry syrup lacks. It makes most sense in drinks that already take the cherries, so nothing goes to waste. The jar matters most. Syrup from real marasca cherries is an ingredient in its own right. The liquid under neon-red cocktail cherries is corn syrup and dye, and tastes like it.
Cocktail cherry syrup
Pour the syrup from a jar of good cherries, like amarena, in the same measure.
Bottled cherry syrup
A great alternative. A single drop of almond extract brings right back the missing bitter-almond note.
This pomegranate syrup maintains the sweetness and red color, but leaves out the cherry and almond.
A poor choice. The clear liqueur holds less than half the sugar and quickly makes everything too alcoholic.
Ernest Wiegand at Oregon State worked out the modern method in the 1920s. Calcium salts in his brine keep the fruit firm without alcohol. The cherries are bleached in brine, then dyed and sweetened, so the red cocktail cherry holds no alcohol.
Sealed, it keeps for months on its sugar alone; once open, keep it in the fridge. It thickens as it loses water, so an old jar pours heavier and sweeter at the same measure.