Cream of Mushroom Soup

2 tablespoons extra virgin olive oil
3 tablespoons unsalted butter
1 yellow onion diced
2 stalks celery, diced
1 carrot, diced
2 cloves garlic, minced
1 ½ pounds button mushrooms, sliced
¼ cup all-purpose flour
¼ cup white wine
1 ½ quarts chicken broth
1 bay leaf
1 sprig thyme
¼ cup heavy cream
Kosher salt
Freshly ground black pepper

Heat a large, heavy pot over medium-high heat until hot but not smoking. Add the oil and butter and swirl to coat the bottom of the pot. Add the onion and sauté for 4 to 5 minutes, or until soft. Add the celery and carrot and sauté for 5 to 6 minutes, or until soft.

Add the mushrooms and sauté for another 5 to 6 minutes, or until soft. Add the garlic and sauté 1 to 2 minutes more, or until fragrant. Stir in the flour. Add the wine and simmer, stirring, for a minute or so. Add the broth, bay leaf, thyme, and cream.

Bring to a boil and simmer, stirring occasionally, for about half an hour, or until the flavors come together. Discard the bay leaf and thyme sprig, remove from the heat, and puree with an immersion blender until smooth. Season to taste with salt and pepper, ladle into bowls, and serve immediately.