Preheat your oven to 375°F (190°C). Soften your cream cheese by leaving it at room temperature for about 15 minutes. Dice or shred your rotisserie chicken.

In a mixing bowl, mash the softened cream cheese until creamy. Add in the sour cream and mix until smooth.

Incorporate the buffalo sauce and garlic powder into the mixture and stir until evenly combined.

Gently fold in the diced chicken, shredded cheddar, and mozzarella cheeses. Reserve some cheese for topping.

Transfer the mixture into a greased 8x8 inch baking dish. Spread evenly and sprinkle reserved cheese on top.

Bake for 20-25 minutes or until bubbly and golden on top.

Let the dip rest for about 5 minutes, garnish with diced green onions, and serve with dippers.