Chicken and Dumplings Casserole

The Butter Foundation: Preheat your oven to 350°F. Pour the melted butter into the bottom of a 9×13 inch baking dish.
The Chicken Layer: Spread the shredded chicken (and veggies, if using) evenly over the melted butter. Season the chicken lightly with pepper. Do not stir.
The Batter Pour: In a medium bowl, whisk the flour, baking powder, salt, and milk until smooth. Pour this mixture slowly over the chicken. Do not stir.
The Broth Finish: In another bowl, whisk together the chicken broth and cream of chicken soup until well combined. Gently pour this over the batter layer. Do not stir.
The Bake: Place the dish in the oven for 40–45 minutes.
The Transformation: Watch through the oven door! The batter will migrate to the top, turning golden brown and fluffy, while the broth and soup thicken into a savory gravy underneath.
The Rest: Let the casserole sit for 5–10 minutes before serving. This allows the “dumpling” layer to fully set and the gravy to thicken.

The “No Stir” Rule: I cannot stress this enough—if you stir the layers, you will end up with a cloudy, gummy mess. The physical separation of the fat (butter), the starch (batter), and the liquid (broth) is what creates the distinct textures.
The Broth Temperature: Use warm chicken broth. If the broth is ice-cold, it can “shock” the melted butter and cause it to clump, which affects how the dumplings rise.
The Seasoning: Rotisserie chicken and canned soup are often salty. Taste your broth mixture before pouring it in; you likely won’t need to add extra salt, but a heavy hand with the black pepper makes it taste more authentic.