Preheat oven to 350°F (skip this step if you're microwaving). Whip the cottage cheese in a blender or food processor for 10–20 seconds until smooth.
Drain the canned chicken and add it to an oven- or microwave-safe dish. Mix in the whipped cottage cheese, cream cheese, buffalo sauce, and ranch seasoning until fully combined. Top with shredded cheese.
Bake for 20 minutes at 350°F until bubbly and heated through. – Or microwave until hot if you're short on time. Optional: Garnish with green onions and dig in!