Bring a pot of salted water to a boil and cook the pasta until al dente. Drain and set aside.
1 cup short pasta
Preheat the oven to 350°F (180°C). Lightly grease a 9×13-inch baking dish with nonstick spray.
Nonstick spray
In a large bowl, combine the cooked pasta, shredded chicken, cream of chicken soup, Greek yogurt, ranch seasoning, and half of the bacon. Mix until everything is well incorporated.
3 cups cooked, 10.5 ounces cream of chicken soup, 1 cup Greek yogurt, 3 tablespoons ranch seasoning mix
Spread the mixture evenly into the prepared baking dish. Top with the cheddar and mozzarella cheeses.
1½ cups shredded cheddar cheese, 1 cup shredded mozzarella cheese
Bake uncovered for 25 minutes, or until bubbly and the cheese is fully melted. Let the casserole rest for 5 minutes before serving.
Sprinkle the remaining bacon and crushed potato chips over the top.
1 cup cooked and crumbled bacon, 2 cups crushed potato chips