Blomkålsuppe is a traditional cauliflower soup. Although there are many variations, the soup is usually made with a combination of cauliflower florets, meat stock, egg yolks, salt, white pepper, cream, butter, onions, flour, and nutmeg. The cauliflower is boiled in salted water and one half is divided into florets and set aside.
The rest is cooked until mushy and blended with a bit of water until the combination turns into a smooth sauce. The onions are sautéed in butter and mixed with flour, stock, and cauliflower sauce. The soup is brought to a boil while being stirred, and a mixture of egg yolks, cream, nutmeg, and white pepper is then added to the soup while constantly stirring.