01 - In a medium saucepan over medium heat, melt the beef drippings or butter.
02 - Whisk in the flour and cook for 2 to 3 minutes, stirring constantly, until mixture is golden and bubbling.
03 - Gradually whisk in the beef stock, ensuring the mixture remains smooth without lumps.
04 - Bring the mixture to a gentle simmer, stirring frequently, and cook until thickened, about 8 to 10 minutes.
05 - Stir in kosher salt, black pepper, and Worcestershire sauce if using. Adjust seasoning to taste.
06 - Optionally strain the gravy through a fine mesh sieve for an extra-smooth texture before serving hot.