Creamy mushroom soup can be made either dairy or pareve. Cremini and shiitake mushrooms are browned in batches, then simmered with onion, garlic, thyme, white wine and broth, and finished with heavy cream or cashew cream.
Brown the Mushrooms in Batches
Most mushroom soups taste watery because the mushrooms go into the pot all at once and steam. Cook them in batches in a hot pot with plenty of room, so they release their moisture and turn deep golden. That browning is where the soup’s rich, earthy flavor comes from. Stir the flour into the softened onion before adding the liquid to thicken the soup.
Kosher Notes
Choose one version and stick with it. For a dairy soup, use butter, heavy cream and vegetable broth; never chicken broth, since meat and dairy can’t be cooked together. For a pareve soup, use margarine, vegetable broth and cashew cream (1 cup raw cashews blended with 1 cup hot water) or full-fat coconut milk. Chicken broth works only in a version made with margarine and a non-dairy cream, which makes it a meat soup.
Storing
The soup keeps for 4 days and freezes for 3 months, though the texture may change slightly after freezing.

Ingredients
Method
- Heat 2 tablespoons butter in a large heavy-bottomed pot over medium-high heat. Add half the mushrooms in a single layer and cook without stirring for 4-5 minutes until golden brown on one side. Stir and cook another 3-4 minutes. Transfer to a plate and repeat with remaining mushrooms.
- In the same pot, melt remaining 2 tablespoons butter over medium heat. Add onion and cook for 5 minutes until softened and lightly golden. Add garlic and cook 30 seconds until fragrant.
- Sprinkle flour over the onions and stir constantly for 2 minutes until the mixture smells nutty and turns light golden. This is your roux.
- If using wine, pour it in now and scrape up any browned bits. Cook for 1 minute to let alcohol evaporate. Gradually whisk in the broth, making sure no lumps form.
- Return the cooked mushrooms to the pot along with thyme, salt, and pepper. Bring to a boil, then reduce heat and simmer for 15 minutes, stirring occasionally.
- Stir in the cream and heat through for 2-3 minutes. Don't let it boil once cream is added. Taste and adjust seasoning with salt and pepper.
- Ladle into bowls and garnish with fresh dill. Serve immediately with crusty bread.
Notes
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