In a large oven-safe skillet, cook sausage over medium heat until browned and fully cooked. Drain excess grease if necessary.
Stir in garlic and cook for 1 minute until fragrant.
Pour in the beer, scraping up browned bits from the bottom of the skillet. Simmer for 2–3 minutes.
Reduce heat to low and stir in cream cheese until melted and creamy.
Add cheddar, mozzarella, paprika, mustard, and black pepper. Stir until smooth and fully melted.
Keep warm on low heat or transfer to the oven at 350°F (175°C) for 5 minutes if you want a bubbly golden top.
Garnish with fresh parsley or green onions. Serve immediately with pretzels, chips, or toasted bread.