Heat the oven: Preheat to 350°F (175°C). Lightly grease a 9x13-inch baking dish with olive oil or butter.
Soften the cream cheese: In a large bowl, let the cream cheese sit at room temp for 10–15 minutes.
Softer cream cheese blends smoother and avoids lumps.
Mix the sauce base: Add sour cream, ranch seasoning, garlic powder, onion powder, and black pepper to the bowl. Whisk until smooth.
Loosen with broth: Gradually whisk in the chicken broth until the sauce is pourable but still creamy. It should coat a spoon without feeling gloopy.
Add the good stuff: Stir in 1 1/2 cups of the cheddar, half the bacon, and half the green onions.
If using veggies, fold them in now.
Prep the ramen: Break each ramen brick into 3–4 chunks. Don’t boil them—dry noodles go straight into the casserole.
Assemble: Scatter the dry ramen evenly in the baking dish. Top with the shredded chicken.
Pour the sauce over everything, pressing lightly with a spatula to help the liquid reach the noodles.
Cover and bake: Cover tightly with foil and bake for 20 minutes. This traps steam and softens the noodles.
Uncover and finish: Remove the foil, sprinkle the remaining 1/2 cup cheddar on top, and bake another 10–15 minutes, until bubbly and golden at the edges.
Rest and garnish: Let the casserole sit 5–10 minutes so it sets. Top with remaining bacon, green onions, and a pinch of red pepper flakes if you like heat.
Serve: Scoop generous portions and enjoy while warm and melty.