Guinness Beer Cheese Dip

Name: Guinness Beer Cheese Dip
Prep time: 10 min
Cook time: 20 min
Total time: 30 min
Cuisine: British
Ingredients: 1 cup Guinness beer (You can use other stout beer if preferred.); 2 tablespoons butter (Unsalted is recommended.); 2 tablespoons all-purpose flour (For thickening the dip.); 1 cup milk (Whole milk for creaminess.); 2 cups sharp cheddar cheese (Freshly shredded for best results.); 1 teaspoon garlic powder (Adjust to taste.); 1/2 teaspoon onion powder (Adds depth of flavor.); 1/2 teaspoon mustard powder (Optional, for a slight tang.); to taste salt and pepper (Adjust seasoning at the end.)