
Redcurrant syrup is redcurrant juice cooked down with sugar.
Redcurrants are sharply tart, so sugar for sugar this syrup is sourer than most berry syrups. It sweetens, adds a bright red color and brings some acidity of its own.
Homemade syrup
Simmer 300 g of redcurrants with 150 ml of water and 200 g of sugar for about 15 minutes, then strain. It makes about 400 ml, less sweet than a bottled version.
Redcurrant jelly
Melt it into an equal volume of hot water and pour the same amount.
The closest swap among other red fruit syrups. Use the same measure, but expect a sweeter and less tart flavor.
Crème de cassis
This blackcurrant liqueur brings blackcurrant flavor and a little alcohol. Poured in the same amount, it makes a less sweet drink.
A poor choice. It colors the liquid red but completely lacks any currant flavor.
Homemade syrup keeps two weeks in the fridge; a sealed bottle keeps for months.