Over medium heat, whisk together the flour and butter until a roux forms. Add garlic powder, onion powder, Worcestershire, parsley, salt, and pepper to roux; whisk together for roughly one minute.
Add beer (½ c. at a time), whisking frequently, until the mixture begins to thicken.
Add shredded cheddar cheese and whisk until fully melted and combined.
Serve immediately + enjoy!
Notes
Use a beer of your liking, as the flavor will come through in the beer cheese!