

Basil Rathbone’s ice-cold Vichyssoise is brilliant. Using sparkling Vichy mineral water adds a literal effervescence. This transforms a heavy purée into a light, bubbly, and refreshing summer soup. I was so intrigued, I had to try it. He's so adamant about serving this soup ice cold. He's right!
Basil Rathbone’s Vichyssoise (or Vichy sois) is an ultra velvety soup that beautifully marries the rich, buttery comfort of savory leeks and potatoes with a luxurious splash of chilled sour cream. But the real magic happens when that crisp, sparkling Vichy water hits your tongue, creating a delightfully unexpected, fizzy brightness that effortlessly elevates the entire dish! {recipe from 1938}
It may not look like much, but it's almost like delicate pop rocks going off in your mouth. I know this is not French Vichy water, but the Vichy Catalan from Spain was the only one I could find at the grocery store, and it works it's magic just as much as I think the French version would.
A little bit on the Vichy water: this is unlike any other mineral water I've ever had. Vichy water outshines Perrier, S.Pellegrino, and Saratoga for its velvety, gentle fizz. I guess volcanic minerals create a beautifully rich flavor that feels luxuriously effervescent and incredibly smooth.
This is one recipe that frustrates many because there are no measurements! I just put on my Sherlock Holmes hat and tried to solve the case of this recipe as best as I could. Here are my notes:
- 2 medium potatoes peeled (large dice) and boiled with
- 3/4 of a large onion (chopped)
- the white of one small leek (chopped)
- all boiled in salted water, just to cover the contents of the pan.
When potatoes were cooked, I drained about 3/4 of the water away and mashed the potatoes, onion and leek with a little water left in pan. Added a bit more salt. No pepper. We want the soup to stay as white as possible.
This mixture was then pureed with an immersion blender and put in a bowl in the refrigerator overnight (or for several hours).
- The next day I added about 3/4 cup of sour cream and a big handful of chopped chives.
- Stirred it all well so it was thoroughly mixed.
- Back in the fridge to chill for at least 3 hours.
- Then added about 1 cup to about 1 1/2 cups of cold Vichy Water.
- Back into the fridge it goes for at least 2 hours.
- 15 minutes before eating, chill soup bowls in the freezer.
- Serve in ice-cold large shallow bowls and garnish with more chives.
Luckily we have chives growing in the garden! Anyways, this soup was very unique and kind of fun to make in that science experiment sort of way.
To beat the heat, this is a great way to skip the heavy cooking and sip on an elegant chilled soup. Elementary, my dear Watson!
P.S. I also made William Shatner's Carrot Vichyssoise a few weeks ago, which was wonderful, but this one from Basil is at a whole other level!
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