• 1 tbsp. finely chopped fresh chives, for garnish
• Homemade Herb Croutons (see recipe), or store-bought croutons, for garnish
In large pot, melt butter over medium-low heat. Add shallots and cook, stirring occasionally, until softened, about 4 minutes. Add garlic and cook 2 minutes more. Stir in flour and cook 1 minute more, then add mushrooms, 1/4 cup wine, chicken broth, salt and pepper. Bring to boil, then lower heat and simmer, uncovered, for 15 minutes, until mushrooms are tender.
Using slotted spoon, remove about 2 large ladlesful of mushrooms and set aside (don't worry if there are some shallots mixed in there). Using a handheld immersion blender, purée soup until smooth. (Alternatively, let soup cool slightly and use a blender to purée in batches. Be sure to remove center knob on blender top and cover with a dish towel to avoid splatters; fill blender only halfway to process.)
Stir in cream, remaining 1/4 cup wine, thyme, sage and reserved mushrooms. Bring to simmer, then taste and adjust seasoning with salt and pepper, if necessary. Ladle into bowls and top with chives and croutons.