Make Sauce: Bring a large cast iron skillet to a medium-high heat and add 1 tablespoon butter to melt. Add the shallots to sauté until softened. Pour in the 3/4 cup white wine and simmer for 5 minutes. Add the cream and continue to simmer for another 3 minutes. Now add the remaining butter 1 tablespoon at a time and whisk continuously. Add the lemon zest, taste, and make any flavor changes according to your personal preferences. Set aside.
Prep Halibut: Pat the fish fillets dry with clean paper towels. Season generously with salt and pepper.
Cook Halibut: Bring a separate, large skillet to a medium high heat and add a 1/2 tablespoon of butter to melt. Sear the fish for 2-3 minutes per side or until cooked through and easily flaked with a fork. Remove and let rest for a few minutes.
Serve: Enjoy the pan seared halibut with some Lemon Buerre Blanc Sauce on top!
Notes
Dairy Free: simply use a plant-based butter and a dairy-free cream alternative, like NutPods.
Storage: leftover fish can be kept in an airtight container in the fridge for 2-3 days. Be sure to store separately from the sauce to help prevent sogginess.
Nutrition Info is for the pan seared halibut only, not the sauce, since it can be optional and amounts may vary.