Baked Potato Chicken Broccoli

The first time I made this casserole, it was supposed to be a quick Tuesday dinner, but my daughter burst into tears that same afternoon. I ended up assembling everything with a toddler clinging to my leg, somehow still managing to get it into the oven. When we finally sat down to eat, she took one bite and immediately stopped crying, asking for seconds.

Last winter, my friend Sarah came over after a rough week at work. I pulled this bubbling dish out of the oven, and she literally leaned over the pan inhaling the steam before we even sat down. We ate standing up in the kitchen, talking and laughing until the casserole was gone and the bottle of wine was empty.

Ingredients

• 2 cups cooked chicken breast, cubed or shredded: Rotisserie chicken works perfectly here, saving you an extra cooking step on busy nights
• 4 medium russet potatoes, peeled and diced: Cut them into uniform 1 inch pieces so they cook evenly and finish at the same time
• 2 cups broccoli florets, chopped: Fresh broccoli gives better texture than frozen, but thaw and drain frozen if that is what you have
• 1 small onion, finely chopped: The onion sweetens as it bakes, creating a subtle depth that balances the creamy sauce
• 2 cloves garlic, minced: Fresh garlic makes a difference here, so avoid the jarred stuff for the best flavor
• 1 cup sour cream: Full fat sour cream creates the richest sauce, though Greek yogurt works if you prefer something lighter
• 1 cup shredded cheddar cheese plus extra for topping: Sharp cheddar gives you more flavor, so you can use less while still tasting the cheese
• ½ cup milk: Whole milk creates the creamiest results, but any milk you have will work in a pinch
• 2 tablespoons unsalted butter: Melt this before mixing it into the sauce so it incorporates evenly without clumping
• 1 teaspoon salt: Season the potato cooking water generously, then use this measured salt in the sauce
• ½ teaspoon black pepper: Freshly ground pepper adds a little bite that cuts through the rich dairy
• ½ teaspoon paprika: Smoked paprika adds a subtle depth, but regular works fine if that is what you have
• ½ teaspoon dried thyme: Thyme pairs beautifully with both chicken and potatoes, tying the flavors together

Instructions

Get your oven ready:

Preheat to 400F and give your 9x13 baking dish a quick coating of butter or cooking spray so nothing sticks later

Precook the potatoes:

Boil the diced potatoes in salted water for 8 to 10 minutes until they are just tender when pierced with a fork

Prep the broccoli:

Steam the florets for 3 to 4 minutes until they turn bright green but still have some crunch

Combine the base mixture:

In a large bowl, mix together the cooked potatoes, broccoli, chicken, onion, and garlic until evenly distributed

Make the creamy sauce:

Whisk together the sour cream, milk, melted butter, 1 cup cheese, and all seasonings until completely smooth

Coat everything:

Pour the sauce over the potato and chicken mixture, folding gently until every piece is covered in the creamy mixture

Assemble the casserole:

Transfer everything to your prepared baking dish and spread it evenly, then sprinkle the remaining cheese across the top

Bake until golden:

Bake uncovered for 25 to 30 minutes until the cheese is bubbly and starting to turn golden brown in spots

Let it rest:

Wait 5 minutes before serving so the sauce has time to set slightly and makes serving easier

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This became my go to meal when friends welcome new babies or need a comforting dinner during difficult weeks. Something about warm potatoes and creamy sauce just feels like a hug in food form.

Make Ahead Magic

I have learned you can assemble this entire casserole the night before and refrigerate it, covered tightly with foil. Add about 10 minutes to the baking time since it will be cold going into the oven, but the results taste just as good.

Serving Suggestions

A crisp green salad with a bright vinaigrette cuts through the richness of this casserole perfectly. Sometimes I serve roasted carrots on the side when I want more color on the plate.

Storage and Reheating

Leftovers keep beautifully in the refrigerator for up to 4 days and actually taste better the next day when the flavors have had more time to meld together. Reheat individual portions in the microwave, or cover the whole dish with foil and warm it in a 350F oven until heated through.

• Freeze assembled unbaked casseroles for up to 3 months, thawing overnight before baking as directed
• Add a splash of milk when reheating leftovers if the sauce seems too thick
• The cheese topping browns best when baked from room temperature rather than straight from the fridge

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This recipe has saved more weeknight dinners than I can count, and somehow it never fails to make everyone at the table feel just a little more comforted.

Recipe Questions & Answers

→ Can I make this ahead of time?

Absolutely. Assemble everything in the baking dish, cover tightly, and refrigerate up to 24 hours before baking. Add 5-10 minutes to the cooking time if baking cold from the refrigerator.

→ What other vegetables work well?

Cauliflower, carrots, or green beans make excellent additions or substitutions. Just ensure harder vegetables are partially cooked before assembling since the baking time is relatively short.

→ Can I freeze leftovers?

Yes, portion the cooled casserole into airtight containers and freeze for up to 3 months. Thaw overnight in the refrigerator and reheat at 350°F until warmed through.

→ Is this dish spicy?

No, the paprika provides mild smoky flavor without heat. If you prefer some warmth, try adding a pinch of cayenne pepper or red pepper flakes to the creamy sauce mixture.

→ Can I use raw chicken instead of cooked?

You'll need to cook the chicken first since the baking time isn't sufficient to cook raw chicken safely. Poach, grill, or bake the chicken breast separately before cubing and adding to the mixture.

→ What if I don't have sour cream?

Greek yogurt, plain yogurt, or cream cheese make excellent substitutes. Each will slightly alter the flavor profile but maintain the creamy texture that makes this dish so satisfying.