Classic Mushroom Bisque

Three cups of sliced mushrooms sautéed in a generous half cup of unsalted butter, thickened with flour, and finished with two cups of cream and a splash of dry sherry. This is a classic bisque that doesn’t apologize for being rich. Every spoonful is velvety, earthy, and deeply savory.

The roux technique here is straightforward but requires attention. After the mushrooms are just tender, sprinkle in the flour and dry mustard and stir constantly for one minute. That minute of stirring cooks out the raw flour taste without browning it; you want a blonde roux, not a dark one, to keep the soup pale and delicate. The dry mustard adds a subtle sharpness that amplifies the mushroom flavor without tasting like mustard.

Pour in the chicken broth and cook uncovered until the mixture thickens into a smooth, glossy base. Then the cream goes in gradually, stirred gently. Do not let the bisque boil after adding the cream, or it will break and turn grainy. Keep it at a gentle heat, just below a simmer, until everything is warmed through.

The sherry goes in right before serving so its boozy warmth hits your nose as you lift the spoon. A dollop of sour cream and a parsley sprig on top finish it off.

Chef Tips

• Stir the flour-mushroom mixture constantly for the full minute; burned flour ruins the whole batch
• Add cream in a slow stream while stirring to prevent it from shocking and separating
• Use dry sherry, not cooking sherry, which is loaded with sodium
• Slice mushrooms uniformly for even cooking and a polished presentation

Variations

• Wild mushroom: Use a mix of cremini, shiitake, and oyster mushrooms for deeper flavor
• Truffle finish: Drizzle truffle oil over each bowl instead of the sherry
• Lighter version: Replace half the cream with whole milk