Soured Soup Easy

This is a very simple Eastern European soup, perfect for all the keen home bakers as it uses up sourdough starter.


  • 250g sourdough starter
  • 40g dried mushrooms
  • 1/4 teaspoon of salt
  • 1/4 teaspoon of ground cumin
  • 1 small white onion, finely chopped
  • 4 medium white potatoes
  • 2 litres of vegetable or chicken stock
  • 1 garlic clove, finely sliced
  • Croutons to serve


The night before you make the soup (and bake a batch if bread), feed your sourdough starter and soak the mushrooms in cold water 

Preheat the oil in a large saucepan and add the onion with salt and cook until starting to golden

Add the garlic, cumin, mushrooms and the stock and simmer for 20 minutes

Cut the potatoes into small cubes and add to the soup and simmer for another 10-15 minutes or until cooked 

Add the weighed out starter to the soup and heat through 

Thin the soup out a little if it is too thick and season with salt and pepper to taste, pour into bowls and decorate with the croutons