Pan-Seared Salmon with Beurre Blanc

Ingredients

• 4 skin-on salmon fillets, 6 oz each, 1 to 1 1/4 inches thick
• 1 teaspoon kosher salt
• 1/2 teaspoon white pepper
• 1 tablespoon neutral oil, such as grapeseed
• 2 large shallots, finely minced (about 1/3 cup)
• 1/3 cup dry white wine, such as Sauvignon Blanc
• 1/3 cup white wine vinegar
• 2 tablespoons heavy cream
• 1 cup (2 sticks) cold unsalted butter, cut into 1/2-inch cubes
• 1 tablespoon fresh chives, minced
• 1 teaspoon fresh lemon juice
• Kosher salt, to taste

Method

1. Take the salmon out of the refrigerator 20 minutes ahead. Pat the skin completely dry and run a fingertip down the center of each fillet to find any pin bones, then pull them with tweezers.
2. Start the sauce. Combine the shallots, wine, and vinegar in a small saucepan and simmer over medium heat until the liquid reduces to about 2 tablespoons and the pan looks nearly dry, 8 to 10 minutes. That concentrated acid is not a flavor note — it is the thing that keeps a cup of butter from splitting later.
3. Add the cream and simmer 1 minute. The cream is insurance: extra emulsifiers so the sauce forgives you if the heat drifts.
4. Turn the heat to its lowest setting. Whisk in the cold butter two or three cubes at a time, adding more only when the previous batch has almost disappeared. Never stop whisking and never let the sauce simmer.
5. Keep the sauce between 120°F and 130°F (50°C to 55°C). Above roughly 135°F (58°C) the emulsion breaks and you are left with a puddle of melted butter and a lesson. If it starts to look greasy, pull it off the burner entirely and keep whisking.
6. Strain through a fine-mesh sieve if you want it perfectly smooth, then stir in the lemon juice and salt to taste. Hold it off the heat near the stove, or set the pan over another pot of warm — not simmering — water. Do not reheat it directly, ever.
7. Season the salmon with the salt and white pepper right before it hits the pan. Salting early pulls moisture to the surface and there goes your crust.
8. Heat the oil in a heavy stainless or carbon steel skillet over medium-high until it shimmers. Lay the fillets in skin-side down, away from you, and press each one flat with a spatula for 20 to 30 seconds so the skin makes full contact instead of curling.
9. Cook skin-side down 5 to 7 minutes without moving them. Watch the side of the fillet: the opaque line climbs roughly two-thirds of the way up. The skin releases from the pan on its own when it is ready — if you have to force it, it is not.
10. Flip and cook 1 to 2 minutes more, until the center reads 125°F (52°C) for medium or 130°F (54°C) for medium-well. Rest 2 minutes skin-side up so the crust you just built stays crisp.
11. Pool the beurre blanc on warm plates and set the salmon on top, skin-side up. Sauce goes under the fish, never over the skin. Scatter the chives.
12. If the sauce ever breaks, do not throw it out. Put a tablespoon of cold cream in a clean warm pan and whisk the broken sauce back in a few drops at a time until it comes together. Fixing it is part of learning it.