Paleo Buffalo Chicken Casserole (Whole30 & Keto)

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Quick. Flavorful. Zero drama on a Tuesday night.

That’s what this Paleo Buffalo Chicken Casserole delivers every single time. Tender chicken, a silky buffalo-ranch sauce, and low-carb cauliflower rice — all baked together in one dish. Fully Whole30 compliant. Keto-friendly. And honestly? Just really, really good.

My kids don’t hand out compliments easily. Trust me on that.

So when I pulled this out of the oven for the first time and watched them hover around the counter before I’d even set it down — I knew something special had happened.

By the time I grabbed a serving spoon? Half the dish was already gone.

I had to move fast just to get my own portion. That’s the real review right there.

Why You’ll Love This Recipe

• The buffalo-ranch sauce is creamy and bold. Neither flavor bullies the other — they just work.
• It’s on the table in under 40 minutes. Pre-cooked chicken and frozen cauliflower rice make it happen.
• Only 9 net carbs per serving. Cauliflower rice does the heavy lifting there.
• One mixing bowl. One baking dish. That’s your entire clean-up.
• Leftovers reheat beautifully. It’s one of my go-to meal prep recipes.

What Makes the Buffalo-Ranch Sauce So Good

Here’s the thing about this sauce.

It’s only five ingredients. You whisk it together in about two minutes. But the flavor? It tastes like something that took way longer than it did.

Think of it like this — each ingredient has a job.

The Whole30 mayo is your creamy base. It gives the sauce that rich, velvety texture. The coconut cream (the thick solid part only — more on that in a second) adds body and just a touch of sweetness that softens the heat. The hot sauce brings the fiery tang that makes it unmistakably buffalo. The ranch dressing cools it down with herby, savory notes. And garlic powder quietly ties all of it together.

Five ingredients. One bowl. Done.

Pro Tip: Chill your can of coconut milk in the fridge overnight. The solid cream rises to the top and separates cleanly from the liquid. Easy to scoop out exactly what you need.

Ingredients

Here’s everything you need from start to finish:

Ingredient	Quantity	Notes
Cooked chicken (diced or shredded)	4 cups	Rotisserie, leftover, or oven-baked breast
Cauliflower rice (frozen preferred)	3 cups	No thawing needed — goes in straight from frozen
Green onions, sliced	1 cup + extra for garnish	About 4 stalks total
Whole30 mayonnaise	½ cup	Avocado oil mayo is my top pick
Whole30 ranch dressing	¼ cup + 2 tbsp if needed	Compliant store-bought or homemade both work
Coconut cream (solid white part only)	¼ cup + 2 tbsp	From a chilled can of full-fat coconut milk
Hot sauce	½ cup	Frank’s RedHot or any compliant buffalo sauce
Garlic powder	1 tsp	Adds depth without taking over
Salt	½–1 tsp	Taste your sauce first — hot sauce already adds salt
Celery sticks	To serve	Optional but highly recommended
Fresh parsley, chopped	To garnish	Adds a bright, fresh finish
Extra ranch dressing	To drizzle	For serving on top

Recipe at a Glance

Prep Time	Cook Time	Total Time	Servings
10 minutes	30 minutes	40 minutes	4 servings

How to Make It — Step by Step

No complicated techniques here. No special equipment. Just straightforward steps that actually work.

1. Preheat your oven to 350°F (175°C). Rack goes in the center — that’s where you get the most even heat.

2. Mix your base. In a large bowl, combine the shredded chicken, frozen cauliflower rice, and 1 cup of sliced green onions. Toss gently until it’s all evenly distributed.

3. Make the sauce. In a separate medium bowl, whisk together the mayo, ranch dressing, coconut cream, hot sauce, garlic powder, and salt. Keep whisking until the sauce is completely smooth and has that gorgeous golden-orange color throughout.

4. Combine everything. Pour the sauce over the chicken-cauliflower mixture. Toss thoroughly — you want every single piece coated. If it looks a little dry, add those extra 2 tablespoons of ranch dressing now.

5. Transfer to your baking dish. Pour the mixture into a 9×9-inch baking dish. Spread it out evenly with a spoon and press it down lightly so the top is flat.

6. Bake. Uncovered, for 30 minutes. You’re looking for bubbling edges and a slight golden color on top.

7. Rest, garnish, serve. Let it sit for 5 minutes after you pull it from the oven. Then drizzle extra ranch on top, scatter green onions and fresh parsley, and serve with celery sticks on the side.

Tips for Getting It Right

These aren’t optional extras. They’re the details that separate a good casserole from a great one.

Pro Tip: Don’t thaw the frozen cauliflower rice. Straight from frozen into the bowl — it cooks perfectly in the oven and actually helps the casserole hold its texture without going soggy.

Pro Tip: Only use the solid white part of the coconut cream. That watery liquid underneath? It’ll thin your sauce out and mess with the texture. Scoop just the thick layer off the top.

Pro Tip: Pre-cooked chicken is the real time-saver. Rotisserie chicken, leftover baked chicken, or anything you cooked ahead during meal prep all work great. Just make sure it’s a compliant rotisserie if you’re doing Whole30 — check those labels.

Pro Tip: Want more heat? Stir in an extra tablespoon or two of hot sauce before baking. Taste the raw sauce first and go from there.

Variations and Substitutions

This casserole is flexible. Once you’ve made the base recipe, there are a lot of easy ways to change it up depending on your mood or who you’re cooking for.

Variation	What to Change	Result
Extra Spicy	Add 1–2 extra tbsp hot sauce	Bolder, fiery buffalo kick
Milder Version	Reduce hot sauce to ¼ cup	Kid-friendly, more ranch-forward flavor
Blue Cheese Swap	Replace ranch with blue cheese dressing (not Whole30)	Classic buffalo-blue cheese combo
Loaded Toppings	Add crispy bacon bits and avocado slices on top	Heartier, more indulgent finish
Party Dip	Serve without celery; add grain-free chips on the side	Easy shareable appetizer

Make Ahead and Storage

This is one of those rare recipes that’s actually better when you prep it the night before.

Assemble the whole casserole, cover the dish tightly with plastic wrap, and stick it in the fridge. The sauce soaks into everything overnight and the flavors get even deeper. When you’re ready to bake, take it out for 10 minutes to take the chill off, give it a quick stir, and bake as directed.

Leftovers? Store them in an airtight container in the fridge for up to 3 to 4 days.

Freezing works too. Portion the cooled casserole into individual freezer-safe containers and freeze for up to one month. Thaw overnight in the fridge. Reheat in the oven at 325°F, uncovered — this brings back that slightly crispy top that the microwave just can’t replicate.

How to Serve It

Scoop generous portions into wide bowls while it’s still hot.

A drizzle of cold ranch dressing straight from the fridge over the top of a warm, spicy casserole? That temperature contrast is everything. Don’t skip it.

I almost always put out a platter of celery sticks on the side. It’s the same reason buffalo wings always come with celery — that cool crunch is the perfect counterpoint to the creamy, bold filling.

Want to round out the meal a bit more? A simple mixed green salad with lemon juice and olive oil works perfectly alongside this. The brightness of the lemon cuts right through the richness of the buffalo sauce.

Nutrition Overview (Per Serving, Approximate)

Nutrient	Approximate Amount	Notes
Calories	~380–420 kcal	Based on 4 servings
Net Carbohydrates	~9g	Kept low thanks to cauliflower rice
Protein	~38–44g	From chicken and mayo
Fat	~22–26g	Primarily from mayo and coconut cream
Fiber	~3g	From cauliflower and green onions

Nutritional values are approximate. They’ll vary based on the specific brands you use, how much you pile on for toppings, and your portion sizes.

Frequently Asked Questions

Question	Answer
Can I use fresh cauliflower rice instead of frozen?	Yes — but do one extra step first. Pulse fresh florets in a food processor until rice-sized, then sauté in a dry skillet for 4–5 minutes to cook off excess moisture. Skip this and your casserole will turn out watery.
What’s the best chicken to use?	Rotisserie is the fastest option. Oven-baked or Instant Pot-shredded chicken breast work just as well. If using rotisserie on a Whole30, check the ingredient label carefully.
Can I make this ahead of time?	Absolutely. Assemble the full casserole, cover tightly, and refrigerate for up to 24 hours. Give it a quick stir before you bake — then follow the recipe as written.
How do I store and reheat leftovers?	Airtight container, fridge, 3 to 4 days. Reheat in the oven at 325°F (uncovered) for the best texture. Microwave works for individual portions when you’re in a hurry.
Can I substitute the coconut cream?	Coconut cream is what makes the sauce thick and rich. Not dairy-free? Full-fat sour cream or regular cream cheese both work. Doing strict Whole30? Stick with the coconut cream — just the firm white solid, not the liquid underneath.

Recipes You Might Also Enjoy

• Whole30 Chicken Bacon Ranch Meal Prep Bowls
• Buffalo Cauliflower Bites with Dairy-Free Dipping Sauce
• Egg Roll in a Bowl with Creamy Chili Sauce
• Paleo Chinese Chicken Salad (Whole30)
• Whole30 Ranch Dressing (Homemade Dump Ranch)
• One-Pan Lemon Garlic Chicken Thighs with Roasted Vegetables

Final Thoughts

This casserole has been on my dinner table more times than I can count. And every single time, the dish comes back empty.

It works for the spicy-food people. It works for the low-carb crowd. It works for anyone doing a Whole30 who’s tired of eating sad, boring food. Everyone gets what they want — and you only have to make one thing.

That’s the kind of recipe worth holding onto.

If you make this and love it, pass it along to someone who could use a quick, satisfying dinner idea. This one deserves to be shared.

Made this recipe? Drop a rating and a comment below — it genuinely helps other home cooks find this recipe, and I read every single one.