Preheat your broiler to high, ensuring the oven rack is positioned about six inches from the heat source.

In a medium saucepan over medium-low heat, combine 15.5 ounces of shredded white cheddar and cream cheese. Stir continuously for 5-7 minutes until smooth.

Gradually whisk in garlic powder, Dijon mustard, and ½ cup of beer, stirring frequently for another 2-3 minutes. Season with salt and pepper.

Pour the cheesy mixture into an ovenproof skillet or baking dish, spread evenly, and top with reserved shredded white cheddar.

Broil under the preheated broiler for 1-2 minutes, watching closely until bubbly and lightly browned.

Remove from the oven, allow to cool for a minute, and serve immediately with soft pretzels, chips, or fresh vegetables.