01 - Remove steaks from refrigerator 30 minutes before cooking to temper. Pat dry thoroughly and season both sides with kosher salt and black pepper.
02 - Heat olive oil in a large skillet over medium-high heat until shimmering. Sear steaks for 3–4 minutes per side for medium-rare doneness. Transfer to a plate and tent loosely with foil to rest.
03 - Reduce heat to medium in the same skillet. Add butter and minced shallots; sauté for 2 minutes until softened. Add garlic and peppercorns; cook for 1 minute, stirring constantly.
04 - Remove skillet from heat and carefully add brandy. Return to heat and simmer, scraping up browned bits from the bottom, until reduced by half, approximately 2 minutes.
05 - Stir in heavy cream, Dijon mustard, and Worcestershire sauce. Simmer gently for 3–5 minutes, stirring occasionally, until sauce thickens noticeably. Season with salt to taste.
06 - Return rested steaks to the pan and spoon sauce generously over the top. Warm through for 1 minute and serve immediately, garnished with additional peppercorns if desired.