Preheat the oven to 375°F (190°C) and lightly grease a baking dish.
Blend the creamy base by combining Greek yogurt, blended cottage cheese, and cream cheese in a food processor until smooth.
Season the mixture with buffalo sauce, garlic powder, onion powder, and black pepper. Blend again until fully combined.
Add the chicken and cheese to a large bowl, then pour in the buffalo mixture. Stir until evenly coated.
Transfer to the baking dish and spread into an even layer.
Bake for 20–25 minutes, or until hot and bubbly around the edges.
Remove from the oven and top with sliced green onions. Serve warm with your favorite dippers.