I wanted to keep this simple and basic.
So what you need?
4 dl of water
6 dl of sugar
7-8 fresh elderflowers
4 dl of vodka
You can also take the zest from a small lemon if you want a little less sweetness.
a little side note:
Since the flowers are almost all blossomed I took a few extra into flowers and added just to make sure I get the taste right. In the end I had 9 or 10 flowers all together