I know this is very retro – I loved mushroom soup in the ‘90s and now too. It is a lovely soup for a cold night or served with crusty bread, makes a great starter for your dinner party.
The flavour for this soup is enhanced by mushroom powder. I make mushroom powder by blitzing dried shitake mushrooms in a small spice blender. The mushroom powder is not limited to this soup – I use it to inject flavour into pies and pasta sauces.
100g onion, finely chopped
3 garlic, finely chopped
800g white button mushrooms, any black bits brushed off
1 heaped tablespoon mushroom powder
750ml good quality vegetable stock