Preheat your oven to 375°F (190°C) to ensure your dip bakes evenly.
In a mixing bowl, combine the softened cream cheese, 3/4 cup of mozzarella cheese, and 1/2 cup of parmesan cheese. Mix until well combined and creamy.
Spread the cheese mixture evenly in your baking dish. Pour the pizza sauce over the cheese layer.
Sprinkle the remaining 3/4 cup of mozzarella cheese and 1/2 cup of parmesan cheese on top. Arrange the pepperoni slices over the cheese.
Place the baking dish in the oven and bake for about 20-25 minutes, or until the cheese is bubbly and golden.
Remove from the oven and let cool for a few minutes before serving. Enjoy with your favorite dippers!