Preheat: Set the oven to 375°F (190°C). Lightly spray an 8x8-inch baking dish.
Blend the base: In a blender or food processor, combine cottage cheese, Greek yogurt, buffalo sauce, ranch seasoning, and lemon juice.
Blend until smooth and creamy.
Taste and season: Add a pinch of salt and pepper if needed. If you want more heat, add more buffalo sauce.
Fold it together: In a bowl, mix the blended sauce with shredded chicken, half the cheddar, half the blue cheese (if using), and green onion.
Assemble: Spread the mixture into the baking dish. Top with remaining cheddar and blue cheese.
Bake: Cook for 18–22 minutes, until hot and bubbling around the edges and the cheese is melted.
Finish and serve: Let it rest 5 minutes.
Garnish with extra green onion. Serve warm with your favorite dippers.