I learned how to make elderflower cordial from my mother-in-law in Sweden. To make it, you collect 40 elderflower blooms and simmer them with lemons, sugar and water to make a cordial. This cordial can be used to make saft - a soda based drink, and for cocktails, parfaits and more. It's a lovely and ephemeral taste of summer in Sweden. —NotesOnDinner
Combine the elderflowers, lemons and citric acid in a very large heat proof bowl that can accommodate all of the water and sugar. In a large saucepan boil the water and sugar together, stirring until all the sugar has dissolved. Pour the syrup over the elderflowers and lemons and cover with a clean cloth. Let rest for 3-5 days.
Strain the mixture and discard all elderflowers and lemons. Pour cordial into sterilized bottles and store in a cool dark spot. The cordial can be used immediately.
To make saft, add 2 tbsp cordial to 6 ounces of sparkling water, or to taste. Garnish with cucumbers and mint leaves. Variations might include raspberries, strawberries or even a little rhubarb syrup.