• Check elderflowers for dirt and little insects - don't wash!
• Add elderflowers, lemon slices and citric acid to the water in a big pan. (The only ingredient not yet going in is the sugar)
• Heat up to boiling point, stirring occasionally, remove from heat, cover and let infuse overnight, or for at least four hours.
• Strain the liquid through a muslin cloth, to catch all the flowers. Squeeze all that yummy flavour out of the pulp in the muslin!
• Return liquid to the pan and add the sugar.
• Bring to boil again, stirring frequently to dissolve all the sugar, and simmer for 5 minutes.
• In the meantime, clean and sterilise all your glass bottles, lids, a funnel and any other equipment in soapy water. Rinse the bottles and fill them with boiling water and leave for 5 minutes before draining. Alternatively, place the washed bottles and lids in an oven at 140˚C until dry.
• Bottle up the finished cordial while it's still hot, pouring carefully into your warm bottles and closing the lids.

Dilution

• Depending on desired sweetness, dilute 1:5 to 1:10.
• Best enjoyed with sparkling mineral water.
• Optional: Squeeze in some fresh lemon for extra tanginess!