
Few cuts of beef feel as luxurious as filet mignon, and this version delivers that steakhouse experience entirely from your own kitchen. The technique here is classic and deliberate — a screaming-hot cast iron sear followed by a quick oven finish — which builds a deeply caramelized crust while keeping the center buttery and tender. What really elevates the whole thing is the herb butter made with ghee, fresh parsley, thyme, rosemary, and a hint of garlic, which melts over the hot steak the moment it hits the plate. Ghee is the smart swap that keeps this firmly in paleo territory without sacrificing any of the richness you'd expect from a compound butter. There's no coconut oil, no coconut cream, and no hidden coconut-derived ingredients anywhere in the recipe, so it's genuinely clean for anyone navigating that particular sensitivity. Avocado oil handles the high-heat sear beautifully, and the optional lemon zest in the butter adds a bright little lift that makes the whole dish feel restaurant-worthy. Rest the steaks properly before serving and that herb butter will pool into every crevice — it's the kind of dinner that makes a Tuesday feel like a celebration.
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Preheat the oven to 425°F (220°C). Remove the steaks from the refrigerator 20–30 minutes before cooking and pat them completely dry with paper towels. Season all sides evenly with the kosher salt and black pepper.
In a small bowl, combine the softened ghee, parsley, thyme, rosemary, garlic, flaky sea salt, and lemon zest, if using. Stir until evenly mixed, then set aside at room temperature.
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