15 Elderflower flower heads
1.5 litres of water
1 lb sugar
1 tsp citric acid (optional)
Bring water to the boil, add sugar. Place flower heads and lemon in a bowl along with citric acid. Once the sugar is dissolved pour the warm water over the flower heads.
Cover and leave for 24 hours, strain and pour into sterilised bottles.
Serve chilled with sparkling water, with a slice of lemon, mint or lemon balm.