01 - Heat a medium saucepan over medium heat and melt the butter.
02 - Whisk in the flour and cook continuously for 2 to 3 minutes until the mixture turns a light golden color.
03 - Gradually whisk in the strained beef juices and beef stock, ensuring the mixture is smooth and free of lumps.
04 - Bring to a gentle simmer while stirring frequently.
05 - Stir in black pepper, salt, onion powder, and Worcestershire sauce if using.
06 - Allow to simmer for 8 to 10 minutes until the gravy reaches the desired consistency.
07 - Taste and refine seasoning as necessary.
08 - For a smoother texture, strain the gravy through a fine mesh sieve before serving.
09 - Serve warm over roast beef, mashed potatoes, or Yorkshire pudding.