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Creamy Cremini Mushroom Soup



Heat oil in a Dutch oven or soup pot over low heat.
Add in onion; cook/stir until soft and translucent, about 5-7 minutes.
Add in thyme and cook for 1 minute.
Stir in mushrooms; cover and steam until the mushrooms exude their moisture, about 5 minutes.
Sprinkle flour over the mushrooms; increase heat to medium and cook, stirring, for 3-4 minutes.
Gradually whisk in broth, scraping up any flour that clings to the pan.
Simmer/stir occasionally, until thickened and smooth, 5-7 minutes.
Combine sour cream and milk; whisk into the mushrooms.
Season with salt and pepper; gently heat until the soup is hot but not boiling.
Just before serving, stir in lemon juice and sherry (if using).