Baked Sweet Potato Chicken Casserole

Here is my favorite sweet potato chicken casserole recipe, with tender chicken, creamy sweet potatoes, and a mix of cozy spices that makes the whole house smell amazing.

This casserole is what I turn to when I need something hearty and comforting for dinner. My kids actually ask for seconds, which doesn’t happen very often with anything that has vegetables in it!

What Kind of Sweet Potatoes Should I Use?

For this casserole, you’ll want to stick with regular orange-fleshed sweet potatoes rather than the white or purple varieties. The orange ones have that classic sweet flavor that pairs perfectly with buffalo sauce and will give you the best color contrast in your dish. When picking them out at the store, look for sweet potatoes that feel firm and heavy for their size, without any soft spots or wrinkled skin. You can definitely leave the skin on since it adds extra nutrients and saves you prep time – just give them a good scrub before cubing. If you prefer them peeled, that works too, but keeping the skin on helps the cubes hold their shape better during baking.

Options for Substitutions

This casserole is super adaptable, so here are some easy swaps you can make:

• Chicken breasts: Chicken thighs work great here and actually stay more tender during baking. You can also use leftover rotisserie chicken – just add it in the last 15 minutes of cooking to prevent it from drying out.
• Sweet potatoes: Regular russet or red potatoes work fine if you’re not a sweet potato fan. Just keep the cooking time the same since they’re cut into similar-sized pieces.
• Buffalo sauce: Any hot sauce you like will work – try sriracha mixed with a little butter, or even barbecue sauce for a completely different flavor profile.
• Broccoli: Cauliflower florets, Brussels sprouts (halved), or green beans all work well. Just make sure to cut them into similar-sized pieces so everything cooks evenly.
• Cheddar cheese: Monterey jack, pepper jack, or even mozzarella will melt just as nicely. Use whatever cheese you have on hand.
• Turkey bacon: Regular bacon, ham, or even cooked sausage crumbles work great. You can also skip the meat entirely for a lighter version.
• Avocado oil: Olive oil, melted butter, or even coconut oil will work just fine for coating everything.

Watch Out for These Mistakes While Cooking

The biggest mistake when making this casserole is cutting your sweet potatoes too large, which will leave you with undercooked, hard chunks while everything else is done – aim for small, uniform cubes about half an inch so they cook evenly with the chicken.

Don’t skip tossing all your ingredients with oil before baking, as dry vegetables and chicken will result in a tough, flavorless casserole that lacks the moisture needed to bring everything together.

Another common error is adding the cheese too early in the baking process, which causes it to burn and turn bitter – wait until the last 10-15 minutes of cooking to sprinkle it on top for that perfect golden finish.

Finally, make sure your chicken pieces are similar in size to your sweet potato cubes so everything cooks at the same rate, and always check that the chicken reaches 165°F with an instant-read thermometer before serving.

What to Serve With Sweet Potato Chicken Casserole?

This hearty casserole is pretty much a complete meal on its own, but I love serving it with a simple side salad to balance out all those rich flavors. A crisp romaine or mixed greens salad with a light vinaigrette works perfectly to cut through the buffalo sauce and cheese. If you want something warm on the side, some buttery dinner rolls or cornbread are great for soaking up any extra sauce from the casserole. For a lighter option, try some steamed green beans or roasted Brussels sprouts to add more veggies to your plate.

Storage Instructions

Refrigerate: This sweet potato chicken casserole keeps really well in the fridge for up to 4 days in a covered container. I actually think it tastes even better the next day because all those buffalo flavors have time to meld together. Just make sure to let it cool completely before covering and storing.

Freeze: You can definitely freeze this casserole for up to 3 months, which makes it perfect for meal prep. I like to portion it out into individual containers so I can grab single servings whenever I need them. Let it cool completely first, then wrap tightly or use freezer-safe containers.

Warm Up: To reheat from the fridge, just pop it in the microwave for 1-2 minutes or warm it in a 350°F oven for about 15 minutes until heated through. From frozen, let it thaw overnight in the fridge first, then reheat the same way. You might want to add a fresh drizzle of ranch and a sprinkle of green onions when serving!

Preparation Time	15-20 minutes
Cooking Time	50-55 minutes
Total Time	65-75 minutes
Level of Difficulty	Medium

Estimated Nutrition

Estimated nutrition for the whole recipe (without optional ingredients):

• Calories: 2400-2600
• Protein: 180-200 g
• Fat: 140-160 g
• Carbohydrates: 220-240 g

Ingredients

For the casserole:

• 5 medium sweet potatoes (diced into 1/2-inch pieces, skin on or peeled)
• 2 lb boneless chicken breast (cut into 1-inch cubes)
• 2 heads broccoli (cut into 2-inch florets)

For the buffalo mixture:

• 1 cup buffalo wing sauce (I use Frank’s RedHot for authentic flavor)
• 1 tsp ground black pepper (freshly ground preferred)
• 1/2 cup avocado oil (or any neutral oil)
• 2 tsp garlic powder
• 1/2 tsp salt

For the toppings:

• 1/2 cup turkey bacon, cooked and chopped (adds smoky crunch)
• 1 cup cheddar cheese, shredded (sharp cheddar adds more flavor)
• 1/4 cup sliced green onions (for garnish and fresh bite)
• Ranch dressing, to drizzle (optional but recommended for creaminess)

Step 1: Prepare Ingredients and Season Base

• 2 lb boneless chicken breast, cut into 1-inch cubes
• 5 medium sweet potatoes, diced into 1/2-inch pieces
• 2 heads broccoli, cut into 2-inch florets
• 1 cup buffalo wing sauce
• 1/2 cup avocado oil
• 1/2 tsp salt
• 1 tsp ground black pepper
• 2 tsp garlic powder

Preheat your oven to 425°F and grease a 9×13-inch baking dish.

While the oven heats, prepare all your ingredients: cut the chicken breasts into 1-inch cubes, dice the sweet potatoes into 1/2-inch pieces (leaving skin on adds nutrients and texture), and cut the broccoli into 2-inch florets.

In a medium bowl, whisk together the buffalo wing sauce, avocado oil, salt, pepper, and garlic powder until well combined.

This creates your flavor base that will coat everything in the casserole.

I find that mixing the sauce early allows the flavors to meld slightly, giving the dish more depth.

Step 2: Roast Sweet Potatoes First

• 5 medium sweet potatoes from Step 1
• 1/2 of the sauce mixture from Step 1

Transfer the diced sweet potatoes to a large bowl and pour half of the sauce mixture over them, tossing well to coat every piece evenly.

Spread the coated sweet potatoes in an even layer in your prepared baking dish and place in the preheated 425°F oven.

Roast for 30 minutes, stirring halfway through (around the 15-minute mark) to ensure even cooking and caramelization.

Starting the sweet potatoes first is essential since they take longer to soften than chicken and broccoli—this staggered timing ensures everything finishes perfectly tender at the same time.

Step 3: Combine Chicken and Broccoli with Remaining Sauce

• 2 lb chicken breast from Step 1
• 2 heads broccoli from Step 1
• 1/2 of the sauce mixture from Step 1

While the sweet potatoes roast, add the cubed chicken and broccoli florets to the same bowl you used for the sweet potatoes (no need to wash it—those flavor bits will help).

Pour the remaining half of the sauce mixture over the chicken and broccoli, and toss thoroughly until every piece is well coated.

Let this mixture sit at room temperature; the chicken will begin absorbing the buffalo flavors while the sweet potatoes finish their initial roast.

Step 4: Add Protein and Vegetables, Continue Baking

• chicken and broccoli mixture from Step 3
• roasted sweet potatoes from Step 2

After the sweet potatoes have roasted for 30 minutes, carefully remove the baking dish from the oven and give the sweet potatoes a final stir.

Spread the sauce-coated chicken and broccoli mixture evenly over the top of the sweet potatoes, making sure they’re distributed fairly throughout (some pieces can overlap—this is fine).

Return the dish to the 425°F oven and bake for 20-25 minutes until the chicken reaches an internal temperature of 165°F when checked with a meat thermometer.

I always check the thickest piece of chicken to ensure it’s fully cooked before proceeding.

Step 5: Top with Cheese, Bacon, and Finish

• 1 cup sharp cheddar cheese, shredded
• 1/2 cup turkey bacon, cooked and chopped
• 1/4 cup sliced green onions

Remove the casserole from the oven and check that the chicken is cooked through.

Evenly distribute the shredded cheddar cheese over the top, followed by the cooked and chopped turkey bacon and sliced green onions.

Return to the oven for just 5 more minutes, until the cheese is completely melted and bubbly.

Watch this final step closely so the cheese melts beautifully without browning too much.

Step 6: Cool Briefly and Serve

• Ranch dressing, to drizzle

Remove the casserole from the oven and let it cool for 3-5 minutes.

This resting time allows the flavors to settle and makes serving easier.

Drizzle ranch dressing over individual portions or the entire casserole just before serving, if desired.

The creamy ranch balances the spicy buffalo sauce beautifully and adds a luxurious finish.