Pat the salmon fillets dry with paper towels. Season both sides with 1 teaspoon kosher salt and ½ teaspoon black pepper. Dry fish is essential for properly crisp skin.
Crisp the salmon
Heat 1 tablespoon neutral oil in a large skillet over medium-high heat. Place the salmon skin-side down in the pan and press gently with a spatula for the first 20 seconds so the skin stays flat.
Cook for 5–6 minutes until the skin is deeply crisp and the salmon is about three-quarters cooked through.
Flip the salmon and cook the second side for 1–2 minutes, then transfer the fillets to a warm plate.
Deglaze the pan
Lower the heat to medium. Carefully add ¼ cup Irish whiskey to the skillet to deglaze the pan, scraping up the browned bits with a spoon. Let the whiskey simmer for 1–2 minutes until slightly reduced.
Build the glaze
Whisk in 1 tablespoon whole grain mustard and 1 tablespoon amber honey. Allow the sauce to reduce for about 2 minutes until it begins to thicken slightly.
Finish the sauce
Remove the pan from heat and whisk in 2 tablespoons cold Irish butter, one cube at a time, until the sauce becomes glossy and emulsified. Stir in 1 tablespoon lemon juice.
Glaze the salmon
Return the salmon fillets to the pan and spoon the whiskey glaze over the fish for 30 seconds to coat.
Serve
Plate the salmon skin-side up and spoon a little of the whiskey mustard glaze around the fish. Finish with fresh parsley if desired.
Notes
Chef NotesCrisp skin is essential. Start with dry salmon and a properly heated pan.The whiskey should reduce briefly to cook off the alcohol and concentrate flavor.Butter added at the end emulsifies the sauce and gives it a silky texture.StorageRefrigerate leftover salmon in an airtight container for up to 2 days.
Reheat gently in a skillet over low heat to avoid overcooking the fish.