i've been waiting one whole year to try and make my own elderflower cordial (and it turned out to be much more simple than i thought).
here's what i did. you'll need...
1 organic lemon
1 organic orange (if you like)
1 kg sugar
20 g citric acid
25 elderflower blossoms
first rinse off the lemon and orange with hot water and dice them into medium sized slices.
bring 1 litre of water, sugar and citric acid to a boil. after the sugar has dissolved let cook for additional 5 minutes.
now carefully trim the stems away from the elderflower blossoms - don't wash them!
place the blossoms and the lemon/orange slices in two big clean jars (i used two 750 ml jars). pour the hot syrup into the jars and stir gently to blend it all together. store in a dark place for 3-4 days, stirring the cordial once daily.
strain the blossoms and slices from the cordial. bring the cordial to a boil once more until it's hot and pour it into sterilized bottles. store the elderflower cordial in a cool dry place for up to one year. once opened, you have to store the bottles in the refrigerator.
mix one (or two) finger-width of cordial with ice cold sparkling water and add the juice of half a lemon! hope you enjoy this summer drink as much as i do!