01 - Bring the beef tenderloin steaks to room temperature for 20–30 minutes. Pat dry and season both sides with salt and pepper.
02 - Heat olive oil in a large skillet over medium-high heat. Sear the steaks for 3–4 minutes per side for medium-rare, or to your preferred doneness. Transfer steaks to a plate and tent loosely with foil to rest.
03 - Reduce heat to medium. Add the butter and shallot to the same skillet. Sauté for 1–2 minutes until softened.
04 - Add the crushed peppercorns and cook for 30 seconds, stirring constantly.
05 - Carefully add the brandy or cognac. Allow it to bubble and reduce by half, scraping up any browned bits from the bottom of the pan. Use caution if flambéing.
06 - Stir in the beef broth and simmer for 2 minutes to concentrate flavors.
07 - Add the heavy cream and Dijon mustard. Simmer gently, stirring, until the sauce thickens slightly, about 3–4 minutes. Season with salt to taste.
08 - Return the steaks to the skillet, spooning sauce over them, or serve steaks topped with the warm peppercorn cream sauce.