This Baked Potato Chicken and Broccoli Casserole has been a cold-weather favorite at my house for years. I first put these flavors together one rainy evening when I had leftover roasted chicken and a bag of red potatoes sitting in the pantry. The idea of turning mashed potatoes into a hearty, spoonable casserole felt like pure comfort — creamy potatoes bound with sour cream and butter, bright bites of barely-tender broccoli and shredded chicken, and the salty crunch of bacon with a blanket of melted cheese on top. It’s the kind of dish that invites everyone to the table and asks for seconds.

What makes this combination special is the contrast: pillowy mashed potatoes that are properly dried and seasoned, broccoli that still has snap so the casserole doesn’t turn into one monotone texture, and chicken that adds heft without weighing things down. I usually rely on rotisserie chicken when time is short, but leftover roasted bird or quickly poached breasts work just as well. This version serves eight and travels beautifully to potlucks; once, I brought it to a neighborhood dinner and returned to an empty dish and four requests for the recipe.

Ingredients

• Red potatoes (3 lb): I prefer red potatoes for their creamy texture and thin skins; cut into 1-inch pieces for even boiling. Look for firm, blemish-free potatoes and use a good all-purpose brand of salt, such as Morton, when seasoning the mash.
• Butter (4 tbsp) and sour cream (1 cup): These bring richness and silkiness to the mash. Use unsalted butter to control seasoning and full-fat sour cream for the best mouthfeel. For a lighter version, substitute half the sour cream with plain Greek yogurt.
• Kosher salt and black pepper: I typically use 1 tsp kosher salt and 1/2 tsp freshly ground black pepper; taste and adjust because different salts behave differently.
• Garlic powder (1/2 tsp) and paprika (1/2 tsp): These provide warm background flavor without overpowering the potato-chicken-broccoli trio. Smoked paprika adds a lovely depth if you want a subtle smoky note.
• Broccoli crown (2–3 cups florets): Choose a fresh crown with deep green heads. Steam or roast until just tender to preserve texture and color.
• Cooked chicken (3 cups, chopped): Rotisserie or leftover roasted chicken works perfectly. Chop into bite-size pieces so every spoonful has a balanced ratio of potato, veg, and protein.
• Bacon (4 slices, cooked and crumbled): Cook until crisp for texture contrast. Turkey bacon can be used but the pork bacon flavor is my preference for depth.
• Shredded cheese (2 cups, divided): Monterey Jack, Cheddar, or a Mexican blend are excellent; reserve one cup for mixing into the filling and one cup to sprinkle on top for a golden finish.

Instructions

Preheat and prepare dish:Preheat your oven to 350°F and grease a 10-inch square or similar 1½–2 quart baking dish. A glass or ceramic dish works well for even heating; set aside while you work on the filling.Cook the potatoes:Place the 3 lb of 1-inch potato pieces in a large pot and cover with cold water. Bring to a boil over high heat, then reduce to a gentle boil. Cook until fork-tender, about 10–15 minutes. Drain thoroughly in a colander and return the potatoes to the hot pot off the burner so residual heat helps evaporate excess moisture.Steam or roast the broccoli:While potatoes cook, steam broccoli florets for 3–4 minutes or roast at 425°F for about 6–8 minutes until bright green and just tender. Drain any liquid well; you want broccoli that is warm but still slightly crisp to avoid a soggy casserole.Prepare bacon and chicken:Cook 4 slices of bacon until crisp, then crumble. Chop or shred 3 cups of pre-cooked chicken into bite-size pieces. If using raw chicken, poach breasts in seasoned water for 12–15 minutes until 165°F internal temperature, then shred.Mash and season potatoes:With the pot back on the lowest warm setting (or removed from heat entirely), mash the potatoes with a masher until mostly smooth. Stir in 4 tbsp unsalted butter, 1 cup sour cream, 1 tsp kosher salt, 1/2 tsp black pepper, 1/2 tsp garlic powder, and 1/2 tsp paprika. Taste and adjust salt as needed. The low heat helps any excess water evaporate and keeps the texture fluffy rather than gluey.Combine and assemble:Fold in the steamed broccoli, 3 cups chopped chicken, crumbled bacon, and 1 cup of shredded cheese until evenly distributed. Transfer the mixture to the prepared baking dish and sprinkle the remaining 1 cup of cheese over the top in an even layer.Bake:Bake at 350°F for 20–25 minutes, or until the cheese is melted, bubbly, and just starting to turn golden. Let rest 5–10 minutes before scooping to help the casserole firm up for cleaner portions.

Storage Tips

Store leftovers in an airtight container in the refrigerator for up to 4 days. For longer storage, portion into meal-sized containers and freeze for up to 3 months; label with date and reheat from thawed for best texture. Reheat covered in a 350°F oven for 15–20 minutes, or until heated through. To refresh the top, remove the cover for the last 5 minutes to re-crisp the cheese. Avoid prolonged room-temperature storage — refrigerate within two hours of baking.

Ingredient Substitutions

If you’re dairy-free, substitute a dairy-free butter and vegan sour cream and use a dairy-free shredded cheese alternative — texture will be slightly different but still satisfying. To reduce calories, replace half the butter with olive oil and use low-fat sour cream. Switch chicken for cooked turkey or canned chicken in a pinch; for a vegetarian version, omit bacon and add sautéed mushrooms and extra roasted cauliflower for similar heft.

Serving Suggestions

Serve hot with a crisp green salad dressed in a bright vinaigrette to cut the richness. Pickled red onions or a squeeze of lemon over individual portions add a bright contrast. For a cozy family dinner, pair with steamed green beans or roasted carrots; for a potluck, bring along extra bacon bits and chopped chives for garnish so guests can customize their portions.

Cultural Background

This casserole draws on classic American comfort-food building blocks: mashed potatoes, cheese, and bacon. While casseroles appear in many culinary traditions as a way to stretch ingredients, this particular combination is a modern, home-cook evolution of loaded baked potato flavors translated into a communal baked dish — familiar, hearty, and designed to feed a crowd.

Meal Prep Tips

For meal prep, assemble the casserole up to 24 hours in advance in the baking dish, cover tightly, and refrigerate. When ready to serve, bring to room temperature for 20 minutes then bake as directed — add 5–8 minutes if starting from chilled. Portion into single-serving containers after baking for easy grab-and-go lunches.

Making this casserole is a small ritual that always brings people together. Whether you’re feeding a family of eight or baking for a neighbors’ gathering, it hits the spot — creamy, savory, and utterly comforting. Give it a try, make it your own, and enjoy the familiar, satisfying flavors that keep everyone coming back for more.