Bistro Filet Recipe

Preparation

Remove filets from the refrigerator 30–45 minutes before cooking to bring to near room temperature. Pat dry with paper towels.

Season both sides of each filet generously with kosher salt and freshly ground black pepper (about 1/2 tsp salt and 1/8–1/4 tsp pepper per side depending on thickness).

Heat a large heavy skillet (preferably cast iron) over medium-high heat until very hot, about 3–4 minutes. Add 1 tbs vegetable oil and 1 tbs butter and swirl to coat.

Sear the filets: place filets in the pan without crowding. Sear 2.5–3.5 minutes per side for medium-rare (internal temp 125–130°F / 51–54°C). For 1.5–2 in (3.8–5 cm) filets, also sear edges with tongs for 30–45 seconds to render fat. Adjust time for desired doneness.

During the last minute of cooking, add remaining 2 tbs butter to the pan and baste filets continuously with a spoon until glossy and nicely browned.

Transfer filets to a warm plate, tent lightly with foil, and let rest 5–8 minutes while you prepare the Sauce Diane.

In the same skillet used for the beef (leave any browned bits and about 1–2 tbs butter/fat), wipe out any excess oil leaving concentrated fond. If necessary, add 1–2 tbs butter to reach the quantity called for.

Over medium heat, add the minced shallots and sauté 1–2 minutes until translucent and fragrant, scraping up browned bits from the pan with a wooden spoon.

Add the sliced mushrooms and cook 4–5 minutes until they release moisture and begin to brown.

Stir in the minced garlic and cook 30 seconds until fragrant, then add 1 tsp Dijon mustard and 1 tsp Worcestershire sauce, stirring to combine.

Flambé / Deglaze

Remove the pan from the heat briefly. Carefully add the brandy/cognac (60 ml). If you choose to flambé, return pan to the burner, tilt slightly and ignite with a long lighter (keep face and hands back). Let flames burn until they subside, about 10–15 seconds. If not flambéing, simply simmer for 30–45 seconds to reduce slightly and cook off alcohol.

Add the beef stock (120 ml) and bring to a gentle simmer, scraping any browned bits from the bottom. Reduce the liquid by about half, 2–4 minutes.

Lower the heat to medium-low and stir in the heavy cream (120 ml). Simmer gently for 2–3 minutes until the sauce thickens enough to coat the back of a spoon. Do not boil vigorously to avoid splitting the cream.

Taste and season with up to 1 tsp salt and 1/2 tsp freshly ground black pepper. If desired, whisk in an extra tsp Dijon or whole-grain mustard for brightness and texture.

Stir in the chopped parsley and remove from heat.

If a silkier sauce is preferred, strain briefly through a fine sieve into a warm saucepan, pressing on solids to extract flavor, then return to low heat to keep warm.

Place each rested filet on warm plates. Spoon a generous ladleful of Sauce Diane over each filet, allowing some sauce to pool on the plate.

Garnish with a parsley sprig and a small handful of microgreens or a tiny side salad if using. Serve immediately.