Hyldeblomst-Rabarbersaft

June arrives in Denmark with elderflower. The trees along the canals and in the corners of kolonihaver throw out their wide, flat blooms almost overnight, and for two weeks the air smells sweet and green and faintly honeyed. This is the window. If you have rhubarb still standing in the garden, its stalks now deep crimson and tart enough to make your eyes water, you have everything you need for one of the best things the Danish summer kitchen produces.

Hyldeblomst-rabarbersaft is a saft, a concentrated cordial you dilute with cold water and drink all summer long. The rhubarb gives it color: a clear, luminous pink that looks like light through rose glass. The elderflower gives it fragrance: floral, almost musky, impossible to describe until you've smelled it yourself. Together they make something neither could manage alone. One spoonful in a glass of ice water and you've bottled a Danish June.

The method is simple and the waiting does most of the work. You simmer the rhubarb, dissolve the sugar, pour everything over fresh elderflower heads, and then you leave it alone for a full day. The steeping is where it all comes together. When you strain it the next morning and hold the bottle up to the window and see that color, you'll know it was worth the patience. The season decides when you make this, and June won't wait. Pick the flowers when they're open and heavy with pollen. The rest is just time, sugar, and trust.