This keto buffalo chicken casserole delivers a spicy, creamy, and cheesy dinner that's perfect for low-carb meal prep. Packed with bold buffalo wing flavor and ranch dressing tang, it's an…

Ingredients

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Instructions

Step 1

Preheat your oven to 375°F (190°C). While the oven is heating, gather all your ingredients. Using a 9×13-inch baking dish or a similar 2.5-quart casserole dish ensures even cooking and plenty of surface area for that golden, bubbly cheese topping. If you’re using leftover or rotisserie chicken, shred it into bite-sized pieces — about 3 cups total. You can also quickly cook chicken breasts in a skillet or Instant Pot: season with salt and pepper, cook until no longer pink (about 10-12 minutes), then shred with two forks. The key is to have the chicken ready to go so the casserole comes together in minutes.

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Step 2

In a large mixing bowl, combine the softened cream cheese, buffalo sauce, and ranch dressing. Use a hand mixer or a sturdy whisk to blend until the mixture is completely smooth and creamy. Softening the cream cheese is crucial — if it’s too cold, you’ll end up with lumps. Let it sit at room temperature for about 30 minutes or microwave for 15-20 seconds. The buffalo sauce provides the signature spicy kick, while the ranch dressing adds tang and balances the heat. Taste the mixture and adjust the heat level by adding more or less buffalo sauce. For a milder version, use only 1/3 cup.

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Step 3

Add the shredded chicken to the bowl with the creamy sauce mixture. Stir well until every piece of chicken is evenly coated. This ensures each bite is packed with flavor. If you have time, let the mixture sit for 5 minutes to allow the chicken to absorb some of the sauce — this deepens the flavor. Now, fold in 1 cup of the shredded cheddar cheese. Reserve the remaining 1/2 cup for topping. The cheese not only adds a rich, melty texture but also helps bind the casserole together. Transfer the chicken mixture to the prepared baking dish and spread it into an even layer.

Step 4

Sprinkle the remaining 1/2 cup of cheddar cheese evenly over the top. For an extra crispy, golden crust, you can add a light dusting of paprika or even a few tablespoons of crushed pork rinds (for keto-friendly crunch). Place the dish in the preheated oven and bake for 15-20 minutes, or until the casserole is hot and bubbly and the cheese on top is melted and lightly browned. The internal temperature should reach at least 165°F (74°C) if using freshly cooked chicken. For a deeper golden top, switch the oven to broil for the last 1-2 minutes — but watch closely to prevent burning.

Step 5

Remove the casserole from the oven and let it rest for 5 minutes before serving. This allows the casserole to set slightly, making it easier to scoop. Garnish with chopped green onions for a fresh, mild onion flavor that contrasts the spicy buffalo sauce. Serve hot as a main dish, or spoon it over cauliflower rice or a bed of mixed greens for a complete low-carb meal. The leftovers (if any!) can be stored in an airtight container in the fridge for up to 5 days. Reheat in the microwave or oven until warmed through.

For best results

  • For the best texture, use full-fat cream cheese — it provides a richer, creamier sauce that holds up well during baking. Reduced-fat cream cheese can become watery and separate, leading to a grainy consistency. If you must use low-fat, add 1 tablespoon of heavy cream to stabilize the sauce.
  • To save time on busy weeknights, prep the shredded chicken in advance. Cook a large batch of chicken breasts or thighs over the weekend, shred, and store in the fridge for up to 4 days or in the freezer for up to 3 months. Then you can assemble the casserole in under 10 minutes.
  • Buffalo sauce varies in heat level between brands. Frank's RedHot Original is a classic choice with moderate heat. If you prefer extra spicy, add a teaspoon of cayenne pepper or a splash of hot sauce to the cream cheese mixture. For a milder dish, use a mild buffalo sauce or mix with extra ranch dressing.
  • To ensure the casserole doesn't dry out, cover it with foil for the first 10 minutes of baking, then uncover for the last 5-10 minutes to brown the cheese. This traps steam and keeps the chicken moist while still achieving a bubbly top.
  • Make it dairy-free by using dairy-free cream cheese (such as Kite Hill or Violife) and a dairy-free cheddar shred. Be aware that dairy-free cheeses may not melt as smoothly — look for brands with tapioca starch for better melt. Also, use a dairy-free ranch dressing or make your own with dairy-free buttermilk and herbs.
  • For an extra layer of flavor, add 1/4 cup of crumbled blue cheese to the cream cheese mixture. Blue cheese and buffalo sauce are a classic pairing. The tangy, pungent notes elevate the casserole and make it taste even more like buffalo wings. If you're not a blue cheese fan, substitute with extra cheddar.

Variations

  • Make it a Buffalo Chicken and Broccoli Casserole: Add 2 cups of frozen broccoli florets (thawed and drained) to the chicken mixture before baking. Broccoli adds fiber, vitamins, and a nice green contrast. Simply fold it in with the chicken and cheese. If using fresh broccoli, blanch it for 2 minutes first to soften.
  • Turn it into a Buffalo Chicken Dip: Reduce the chicken to 2 cups and increase the cream cheese to 12 oz. Omit the baking step and instead keep the mixture warm in a slow cooker or on the stovetop. Serve with celery sticks, cucumber slices, or pork rinds for dipping. Perfect for game day or parties.
  • Try a Bacon Buffalo Chicken Casserole: Cook 6 slices of bacon until crispy, crumble them, and stir half into the chicken mixture. Sprinkle the remaining bacon on top along with the cheese before baking. The smoky, salty bacon complements the spicy buffalo sauce beautifully.
  • For a vegetarian version, replace the chicken with 3 cups of cooked cauliflower florets or a combination of cauliflower and chickpeas. Cauliflower mimics the texture of shredded chicken and absorbs the sauce well. Bake for an additional 5-10 minutes to ensure the cauliflower is tender.
  • Add a crunchy topping: Mix 1/2 cup of crushed pork rinds with 2 tablespoons of melted butter and sprinkle over the cheese before baking. This creates a crispy, keto-friendly crust similar to breadcrumbs. You can also use crushed almonds or parmesan crisps.

Nutrition

  • Calories385 kcal
  • Total Fat28g
  • Saturated Fat14g
  • Cholesterol145mg
  • Sodium980mg
  • Total Carbohydrates4g
  • Dietary Fiber0g
  • Sugars2g
  • Protein29g

Common Questions

Can I use chicken thighs instead of chicken breasts?
Absolutely! Chicken thighs are more flavorful and stay juicier during baking. Use boneless, skinless thighs and cook them until tender (about 15-20 minutes) before shredding. The higher fat content in thighs also adds richness to the casserole, making it even more satisfying on a keto diet.
How do I store and reheat leftovers?
Store leftovers in an airtight container in the refrigerator for up to 5 days. To reheat, place individual portions in the microwave for 1-2 minutes or in a 350°F oven for 10-15 minutes. If the casserole seems dry after reheating, add a splash of buffalo sauce or a dollop of ranch dressing to restore moisture.
Is this casserole freezer-friendly?
Yes, it freezes well for up to 3 months. Assemble the casserole in a freezer-safe dish, but do not bake it. Cover tightly with foil and plastic wrap. When ready to eat, thaw overnight in the refrigerator, then bake at 375°F for 20-25 minutes until hot and bubbly. You can also freeze individual portions for quick lunches.
Can I make this casserole dairy-free?
Yes, use dairy-free cream cheese and shredded cheese alternatives. Many brands like Kite Hill, Violife, or Daiya work well. Also, ensure your ranch dressing is dairy-free or make a simple version using dairy-free sour cream and herbs. Note that dairy-free cheeses may not melt as thoroughly, but the flavor will still be delicious.
What can I serve with this casserole to keep it low-carb?
Serve over cauliflower rice, zucchini noodles, or a bed of fresh spinach. A side of roasted Brussels sprouts or a simple green salad with ranch dressing also pairs perfectly. For extra fat and satiety, add sliced avocado or a side of bacon-wrapped asparagus.
How do I make this casserole spicier or milder?
To increase heat, use extra buffalo sauce, add cayenne pepper, or stir in chopped jalapeños. For a milder version, reduce buffalo sauce to 1/4 cup and increase ranch dressing to 3/4 cup. You can also use a mild wing sauce or mix in a tablespoon of honey (though this adds carbs).
Can I use rotisserie chicken?
Yes, rotisserie chicken is a great time-saver. Simply remove the skin and shred the meat. About half of a large rotisserie chicken yields 3 cups of shredded chicken. This also adds extra flavor from the rotisserie seasoning, which complements the buffalo sauce nicely.