Creamy Chicken Potato Casserole (One-Pan Dinner)

This chicken potato casserole is the kind of dinner that fills the kitchen with a rich, garlicky smell while it bakes. Tender chicken thighs and thinly sliced potatoes cook in a simple cream sauce until everything is soft and golden on top.

It takes one pan and about an hour from start to finish. You sear the chicken for crisp edges, layer it with potatoes and a garlicky Parmesan sauce, then let the oven do the rest.

Why This Casserole Works

The cream sauce soaks into the potatoes as they bake, so every bite is rich but not heavy. The potatoes soften and absorb the savory liquid, while the top turns bubbly and browned.

Browning the chicken first gives you crispy edges that contrast with the tender meat inside. The whole dish bakes in one skillet, which means a deep, cohesive flavor and barely any cleanup.

Ingredients

• 2 lbs boneless skinless chicken thighs (6 to 8 pieces): thighs stay moist; see Variations for breasts
• 2 lbs Yukon gold potatoes (about 6 medium): sliced 1/4 inch thick for even cooking
• 1 medium yellow onion: chopped
• 4 cloves garlic: minced
• 1 cup heavy cream: the base of the sauce
• 1/2 cup chicken broth: thins the sauce just enough
• 1/2 cup grated Parmesan cheese: divided for the sauce and the topping
• 1 tsp smoked paprika: half for the chicken, half for layering
• 1 tsp dried thyme: classic with chicken and potatoes
• 2 tbsp olive oil: divided for searing and sautéing
• Salt and black pepper: to season throughout

Variations / Substitutions

• Chicken breasts: Swap in boneless breasts, but slice them in half horizontally so they cook evenly. They dry out faster than thighs, so keep an eye on them.
• Sweet potatoes: Replace the Yukon golds with peeled sweet potatoes for a slightly sweeter, earthier dish. The bake time stays close.
• Extra vegetables: Tuck a handful of fresh broccoli florets or baby spinach between the potato layers for more color.
• Dairy-free: Use full-fat coconut milk instead of heavy cream and skip the Parmesan, or use a dairy-free shredded cheese alternative.

If you like creamy chicken dishes, try my One-Pan Creamy Chicken and Rice.

How to Make Creamy Chicken Potato Casserole

Step 1: Sear the Chicken

Preheat the oven to 400°F (200°C). Pat the chicken thighs dry, then season them with 1/2 tsp salt, 1/4 tsp pepper, and 1/2 tsp of the smoked paprika. Heat 1 tbsp of the olive oil in a large oven-safe skillet over medium-high heat. Once the oil shimmers, add the chicken and cook for about 4 minutes per side, until deeply browned.

The chicken does not need to be cooked through; it will finish in the oven. You are looking for a nice crust that will add flavor to the whole dish.

Step 2: Sauté the Aromatics

Remove the chicken to a plate. If the skillet looks dry, add the remaining 1 tbsp olive oil. Lower the heat to medium, add the chopped onion, and cook for 3 to 4 minutes, until it turns soft and translucent. Stir in the minced garlic and cook for 30 seconds more, just until it smells fragrant.

Scrape up any browned bits from the bottom of the pan while the onion releases its moisture. That fond will dissolve into the sauce and make it taste even richer.

Step 3: Layer the Casserole

Take the skillet off the heat. Arrange half of the sliced potatoes in an even layer on the bottom and sprinkle them with a pinch of salt and pepper. Nestle the seared chicken thighs on top, then cover them with the remaining potato slices.

Pour the heavy cream and chicken broth over everything, then scatter half of the grated Parmesan, the remaining 1/2 tsp smoked paprika, and all of the dried thyme across the top. The liquid should seep down between the layers, so give the pan a little shake if needed.

Step 4: Bake Until Golden

Cover the skillet tightly with foil or a lid and place it in the preheated oven. Bake for 30 minutes, then remove the cover. Sprinkle the rest of the Parmesan on top and continue baking for 15 to 20 minutes more, until the top is bubbly and golden and a knife slides easily through the potatoes.

If you want an extra browned top, switch the oven to broil for the last 2 minutes. Watch it closely so the cheese does not burn.

Step 5: Rest and Serve

Let the casserole sit for 5 minutes before serving so the sauce thickens slightly. Spoon it onto plates, making sure each portion gets a piece of chicken, plenty of creamy potatoes, and a drizzle of the sauce from the bottom of the pan.

A Few Tips Before You Start

• Slice the potatoes evenly so they all cook at the same rate; a mandoline makes this quick and consistent.
• If your skillet is not oven-safe, assemble everything in a greased 9×13 inch baking dish instead.
• Chicken thighs give you the most flavor and stay tender, but if using breasts, cut them in half horizontally and reduce the uncovered bake time by a few minutes to avoid drying them out.

Bake times can shift slightly depending on the material of your dish:

Storing Leftovers

• Refrigerate: Store cooled leftovers in an airtight container for up to 4 days.
• Reheating: Reheat in a 350°F (175°C) oven for 15 to 20 minutes until warmed through. You can also microwave individual portions, but the potatoes will lose some of their texture.

What To Serve With This Casserole

A crisp green salad with a sharp vinaigrette cuts through the richness of the cream sauce. Simple steamed green beans or roasted asparagus also work well, because their clean taste balances the hearty casserole without competing.

Frequently Asked Questions

Can I use chicken breasts instead of thighs?

Yes. Thin boneless chicken breasts work, but they can dry out faster. Cook them just until they reach 165°F internally and check a few minutes early.

Can I make this casserole ahead of time?

You can assemble the layers (potatoes and chicken) in the dish, cover, and refrigerate for up to 12 hours. Do not add the cream mixture until just before baking. Add 10 to 15 minutes to the covered bake time.

Can I use different potatoes?

Yukon golds hold their shape well. Russet potatoes get softer and break down a bit more, so the edges will be less distinct but still taste good. Avoid waxy red potatoes because they do not absorb the sauce as well.

How do I keep the sauce from curdling?

Make sure the cream is at room temperature before you add it to the warm skillet. If you pour cold cream directly into a hot pan, the sudden temperature change can cause it to separate.

Chicken Potato Casserole Recipe

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Prep Time 15 minutes mins

Cook Time 45 minutes mins

Total Time 1 hour hr

Servings: 6 servings

Calories: 490

Ingredients Method Notes

Ingredients

  

• 2 lbs boneless skinless chicken thighs (6 to 8 pieces)
• 2 lbs Yukon gold potatoes (about 6 medium), sliced 1/4 inch thick
• 1 medium yellow onion, chopped
• 4 cloves garlic, minced
• 1 cup heavy cream
• 1/2 cup chicken broth
• 1/2 cup grated Parmesan cheese, divided
• 1 tsp smoked paprika, divided
• 1 tsp dried thyme
• 2 tbsp olive oil, divided
• Salt and black pepper

Method

 

1. Preheat oven to 400°F. Pat chicken dry and season with salt, pepper, and 1/2 tsp paprika. Brown in 1 tbsp olive oil over medium-high heat, 4 minutes per side. Remove to a plate.
2. Add remaining 1 tbsp olive oil to the skillet. Cook onion over medium heat for 3 to 4 minutes until soft, then stir in garlic for 30 seconds.
3. Off the heat, layer half the potatoes in the skillet, season with salt and pepper, then nestle in the chicken. Top with remaining potatoes. Pour cream and broth over everything, then add half the Parmesan, remaining paprika, and all the thyme.
4. Cover and bake 30 minutes. Uncover, sprinkle with remaining Parmesan, and bake 15 to 20 minutes until golden and potatoes are tender.
5. Let rest 5 minutes, then serve warm.

Notes

Let the casserole rest for a few minutes after baking. The sauce will thicken and cling to the potatoes better when it is not piping hot.