Melt the butter in a saucepan over medium heat.
Keep stirring to prevent scorching and ensure an even melt.
Add the flour and whisk consistently until the mixture smoothens out.
This process creates a roux.
Gradually pour in the milk while whisking continuously.
The goal is to achieve a smooth consistency without lumps.
Add black pepper, salt, onion powder, garlic powder, and cayenne pepper.
Mix thoroughly until everything is well combined and evenly colored.
Continue cooking over medium heat and stir until the gravy thickens.
You'll notice a glossy finish.