
Berry cordial is a sweetened berry concentrate, diluted or dosed into a drink. Which berry is up to the maker, since the name covers a family and not one product.
It adds sugar and color in one pour, and the berry behind it decides how tart it is. Check the label: the name can cover any berry or a blend.
Another berry cordial
The easiest move is to pour it in the same amount.
Berry syrup
It runs noticeably sweeter, so two-thirds of a measure is plenty. Be sure to add a few drops of lemon juice to bring back the missing tartness.
Berry liqueur
Crème de cassis and blackberry liqueurs sit close in sweetness. Poured in the same volume, they replace the cordial easily but bump up the strength.
A red syrup that often skips pomegranate altogether. It hits the right color but brings no berry flavor, and it falls short on tartness.
Keep an opened bottle in the fridge and pour from it with clean tools. A fizz or a yeasty smell means it has started to ferment: discard it. Homemade cordial lasts two to three weeks refrigerated.