Preheat your oven to 350°F (175°C).

In a large mixing bowl, combine the softened cream cheese, sour cream, and mayonnaise. Blend until smooth and creamy.

Fold in the shredded mozzarella, cheddar, and grated Parmesan cheese until fully combined.

Add the diced green onions, red bell peppers, garlic powder, onion powder, and Italian seasoning. Fold until evenly distributed.

Transfer the mixture to a baking dish and spread evenly.

Bake for 25-30 minutes until bubbly and golden brown.

Let cool for 5-10 minutes before serving.

Serve warm with tortilla chips, crackers, or fresh vegetables.