Anthony Bourdain's Mushroom Soup
• 6 tablespoons butter
• 1 onion, thinly sliced
• 12 ounces button mushrooms, halved
• 4 cups chicken stock
• 1 sprig parsley
• 2 ounces sherry
• salt and pepper
Over medium heat, melt two tablespoons of the butter in a saucepan. Toss in the onion and cook until soft but not browned.
Toss in the remaining butter and then add the mushrooms. Cook for 8 minutes.
Pour in the chicken stock, add the parsley, and bring to a boil. When bubbling, reduce to a simmer and cook for an hour.
Pour soup into a blender (you might need to do this in stages), and process until smooth. Return to the saucepan and bring to a simmer. Pour in the sherry, and season with salt and pepper.