My book club hostess made this last month and we spent more time talking about the recipe than the book

Preheat your oven to 375°F (190°C). Lightly grease a 9×13-inch glass baking dish; this is the classic casserole size and will give you the same look as the bubbly, golden pan everyone passes around and photographs.

Bring a large pot of well-salted water to a boil. Add the dry pasta and cook until just shy of al dente, 1 to 2 minutes less than the package directions. The pasta will finish cooking in the oven, so you want it with a bit of bite to avoid mushiness.
While the pasta cooks, prepare the chicken if needed. If you’re using a rotisserie chicken, pull off the skin and bones and shred the meat into bite-sized pieces with your fingers or two forks. Measure out 3 cups and set aside.
Drain the pasta thoroughly and return it to the warm pot off the heat. Immediately pour in the ranch dressing and stir until every piece of pasta is coated. The residual heat from the pasta will help the dressing loosen and cling.

Stir in the shredded chicken and 1 1/2 cups of the shredded cheddar cheese, mixing until the chicken and cheese are evenly distributed. The mixture will look loose at this point, but it thickens and sets as it bakes and cools.
Transfer the pasta mixture to the prepared 9×13-inch glass baking dish, spreading it into an even layer. Sprinkle the remaining 1/2 cup shredded cheddar evenly over the top. If you’re using bacon, scatter the crumbled bacon over the cheese so it crisps a bit more in the oven.

Place the baking dish on the center rack of the preheated oven. Bake for 20 to 25 minutes, or until the edges are bubbling, the cheese on top is melted and starting to turn golden in spots, and the center is hot. If your oven runs cool, you may need a few extra minutes.
Remove the dish from the oven and let it rest for at least 5 to 10 minutes before serving. This brief rest helps the sauce thicken slightly so the pasta scoops up in satisfying, cheesy clumps—the way it looks when someone digs in with a big silver spoon for that first serving.

Serve the crack chicken pasta straight from the glass baking dish, scooping generous spoonfuls so you get a good mix of pasta, chicken, cheese, and bacon in each portion. Expect conversation to drift immediately to, “Wait, you said this is only four ingredients?”
Variations & Tips