01 - Set the oven temperature to 375°F.
02 - In a mixing bowl, beat the cream cheese until smooth. Add sour cream, mozzarella, cheddar, Parmesan, garlic, spring onions, smoked paprika, black pepper, and cayenne pepper if using. Season with salt as needed and mix thoroughly.
03 - Transfer the cheese mixture into a small ovenproof dish, spreading evenly. Optionally, sprinkle additional grated cheese over the top.
04 - Bake in the preheated oven for 18 to 20 minutes until the surface is bubbly and golden brown.
05 - Remove the dish from the oven and allow it to cool for 5 minutes. Garnish with chopped parsley.
06 - Serve warm accompanied by crackers, sliced baguette, or fresh vegetable sticks.