Pour cream of chicken soup over raw diced chicken breast, along with 3 ingredients

Preheat your oven to 375°F (190°C). Lightly grease a medium ceramic baking dish (about 9×13 inches or similar size) with cooking spray or a thin swipe of butter.

Scatter the raw diced chicken breast evenly over the bottom of the ceramic baking dish, spreading it out so the pieces are in a single, fairly even layer.
Pour the cream of chicken soup directly over the raw chicken in the baking dish. Use a spatula or the back of a spoon to gently spread the soup so it covers most of the chicken pieces.
In a separate bowl or large measuring cup, whisk together the milk and 1/2 cup of the shredded cheddar cheese until the cheese is mostly dispersed. It doesn’t have to be perfectly smooth; you just want the cheese loosened into the liquid.

Sprinkle the uncooked wide egg noodles evenly over the chicken and soup layer in the baking dish, trying to keep them in a relatively even layer so they cook more uniformly.
Pour the milk and cheese mixture evenly over the noodles and chicken. Use the back of a spoon to gently press the noodles down into the liquid and soup so they’re mostly submerged. This helps them cook through and get tender in the oven.
Cover the ceramic baking dish tightly with foil, making sure to crimp the edges so steam is trapped inside. This is important for cooking the noodles and chicken evenly.

Bake, covered, in the preheated oven for 35–40 minutes, until the chicken is cooked through and the noodles are mostly tender. Carefully remove the foil—watch out for steam.
Sprinkle the remaining 1/2 cup shredded cheddar cheese evenly over the top of the hot casserole. Return the uncovered dish to the oven and bake for another 8–10 minutes, or until the cheese is melted and the edges are bubbly and lightly golden.

Let the chicken noodle bake rest for about 5–10 minutes before serving. This helps it set up a bit and makes it easier to scoop. Taste and add a little salt and pepper at the table if you like, then serve warm straight from the ceramic dish.
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