Arnaud's-Style Oyster Soup

Ingredients

Equipment Needed

• •Heavy-bottomed Dutch oven or large saucepan
• •Fine-mesh strainer
• •Whisk
• •Ladle

Instructions

1. 1

   Prepare the oysters

   Drain the oysters through a fine-mesh strainer set over a bowl, reserving every drop of that precious liquor. This liquid is concentrated ocean flavor. You'll add it back to the soup later. Pick through the oysters gently, removing any bits of shell. Pat them dry with paper towels and set aside at room temperature. Cold oysters going into hot broth will drop the temperature and extend cooking time.

   The oyster liquor should smell briny and clean, like the sea. If it smells off or fishy, your oysters aren't fresh. Start over with better product.
2. 2

   Build the aromatic base

   Melt the butter in a heavy-bottomed Dutch oven or large saucepan over medium heat. When it foams and the foam subsides, add the celery and the white and light green parts of the green onions. Season with a pinch of salt right now. This draws moisture from the vegetables and helps them soften without browning. Cook, stirring occasionally, until the celery is translucent and tender, about five minutes. The kitchen will smell clean and sweet.

3. 3

   Add garlic and flour

   Add the minced garlic and stir for thirty seconds, just until fragrant. You'll smell it bloom. Now sprinkle the flour over the vegetables and stir constantly for two minutes. This isn't a dark roux. You want it blond, just cooked enough to lose that raw flour taste. The mixture will look pasty and coat the vegetables evenly.

   White pepper and a light roux keep this soup elegant. Dark roux and black pepper would make it rustic. Both are good, but they're different dishes entirely.
4. 4

   Build the broth

   Pour in the seafood stock in a slow, steady stream, whisking constantly to prevent lumps. Add the reserved oyster liquor. Bring to a gentle simmer, stirring occasionally. The broth will thicken slightly as it heats. Let it simmer for ten minutes to marry the flavors and cook out any remaining flour taste. Taste it. This is your foundation.

5. 5

   Add the dairy

   Reduce heat to low. Pour in the heavy cream and milk, stirring to combine. Add the white pepper, cayenne, and salt. The soup should be creamy but not heavy, coating a spoon but still flowing easily. Heat until you see the first lazy bubbles around the edges. Do not let it boil. Boiling cream can break and turn grainy.

   The cayenne should warm your throat gently on the finish. You shouldn't taste heat upfront. If you want more warmth, add it by the pinch and taste between each addition.
6. 6

   Poach the oysters

   This is the moment that separates good oyster soup from great oyster soup. Slide the oysters into the simmering broth. Watch them. Within two to three minutes, the edges will curl and ruffle, and the oysters will become plump and firm. The second you see those edges curl, your oysters are done. Pull the pot off the heat immediately. Overcooking is the enemy here.

   Properly poached oysters should be just warmed through with a custardy texture inside. If they feel rubbery, they've gone too far. Next time, pull them sooner.
7. 7

   Finish and season

   Remove the pot from heat. Stir in the dry sherry and lemon juice. The sherry adds depth, the lemon brightens everything. Taste the soup now. Adjust salt if needed. The broth should taste like a refined version of the sea, creamy and aromatic with celery and onion notes, finished with gentle warmth. Stir in the fresh parsley.

8. 8

   Serve immediately

   Ladle the soup into warmed shallow bowls, making sure each portion gets four oysters. Scatter the reserved green onion tops over each bowl. Serve with crusty French bread for soaking up the last drops of broth. This soup waits for no one. The oysters continue to cook in the hot liquid, so bring it to the table the moment it's ready.

Chef Tips

• •Buy your oysters the day you plan to cook. Ask your fishmonger when they came in. Gulf oysters from Louisiana, Texas, or Alabama are ideal. They're briny without being overwhelmingly salty, and they have the sweetness that makes this soup sing.
• •If you can't find fresh oysters in the shell, jarred fresh oysters work beautifully here. Just make sure they're packed in their own liquor, not water. The liquor is half the flavor.
• •At Lagniappe, we serve this with a chilled Muscadet or a crisp Chablis. The minerality in those wines echoes the brininess of the oysters. A dry champagne works wonderfully too if you're celebrating.
• •This soup does not reheat well. The oysters will overcook and the cream may break. Make only what you'll eat in one sitting.

Advance Preparation

• •The base (through step 5, before adding oysters) can be made up to one day ahead and refrigerated. Reheat gently over low heat before proceeding with the oysters.
• •Prep all vegetables and drain oysters up to four hours ahead. Keep oysters refrigerated until ready to poach.

Frequently Asked Questions

Nutrition Information

1 serving (about 340g)