Koldskål
On the first warm day of summer, Danes buy cartons of koldskål and packets of kammerjunker, small crunchy rusks, and the season has begun: koldskål is a cold, sweet, tangy buttermilk 'soup' with lemon and vanilla, eaten from bowls as a dessert or a light supper, sometimes with strawberries. Homemade, it is whisked with egg yolks for richness. Raw egg yolk is not suitable for pregnant women, young children or anyone with a weakened immune system, so this recipe uses pasteurised egg yolks. A common mistake is serving it at room temperature; it must be very cold. Chef's tip: whisk the yolks and sugar until thick and pale before the buttermilk goes in, which gives a silky, foamy soup.



