Boil ramen noodles for 2 to 3 minutes until just tender, then drain.
Brown ground beef with diced onion over medium heat for 6 to 8 minutes. Drain excess fat.
Stir in garlic, garlic powder, paprika, salt, and black pepper until fragrant.
Lower heat and mix in sour cream, milk, and mayonnaise until smooth.
Add noodles, bacon, and half the cheese, stirring gently to combine.
Preheat oven to 375°F and lightly grease a baking dish. Transfer mixture evenly.
Top with remaining cheese and bake 20 to 25 minutes until bubbly and lightly golden.
Rest 5 minutes, add toppings if desired, and serve.