Blackcurrants are the most intensely coloured and flavoured of all the currants, especially varieties grown in Britain, which are particularly rich and dark in colour. With numerous health benefits and containing more Vitamin C than any other natural food source, they are also superbly healthy.   Blackcurrants are only in season for a short period of time in the UK – between July and August, so take the chance to really make the most of this short window. Out of season, you can buy frozen blackcurrants in most supermarket – they also come as part of a mixed bag of fruit, so you can use them year-round and are ideal thrown into a smoothie.