I will start off by saying this is not the french way of doing this soup. The proper way or French way would be to basically mix a bechamel with a duxelles of mushroom. This is how I was shown but its time consuming and makes a lot of dishes to clean 👎. Here is a cheat version, well actually 2 , one blended and a chunky one
Note that I would not recommend freezing this soup, I have never tried but can only imagine the texture would be way different.
 You needÂ
- ~700g mushroom sliced ( cremini, shiitake, portobello, or a mix )
- 35g butter
- 1 or 2 shallots finely diced
- 2 garlic cloves minced
- 620ml broth
- 4tbsp flour
- 145ml 35% cream (heavy)
- 1/2tsp dry thyme or fresh thyme
Instructions
- In a pot over medium heat, soften the onion in the butter, about 2 minutes. Add the garlic and mix
- Add the mushrooms and cook for 7 minutes.
- At this point you have 2 choices , if you want to blend the soup reserve about 1/2 cup of the mushrooms aside and blend it, if you go with the chunkier version continue.
- Put the flour in the pot and gently mix.
- Add the stock and bring to a boil while stirring. Reduce heat, cover, and simmer for 10 minutes. The mix should have thickened at this point, if not let it simmer a few more minutes.
- Reduce heat to low and add the cream, make sure it doesn’t boil. If you opted to blend the soup, it’s not time to add back the reserved mushroom. Note that if the soup is too thick, add a little bit of water.
- Add 1-2 sticks of fresh thyme, stir it in and remove them after a minute. Thyme is very powerful and just 1 minute will give it a kick. Do a taste test and adjust with salt and pepper.