Creamy Low Carb Chicken Casserole

Featured in Dinner Classics.

Creamy Low Carb Chicken Casserole is a satisfying, easy weeknight dinner. Enjoy tender chicken in a rich, cheesy sauce, perfect for a healthy meal.
Kenji Tanaka - Recipe Author
Updated on March 15, 2026 at 06:29 AM
Prep Time: 20 min Cook Time: 35 min Total Time: 55 min 6 Servings Beginner
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Creamy Low Carb Chicken Casserole | Recipes By Megan

Oh, hey there, friend! Pull up a chair. I gotta tell you, finding truly comforting, guilt-free meals can be a journey, right? I remember those early days trying to cut down on carbs, feeling like I was missing out on all the creamy, cozy goodness. Then, one chilly evening, staring into my fridge, this idea just clicked. What if I could take that classic, beloved chicken casserole and make it low carb? The result? This amazing Low Carb Chicken Casserole that's become a weeknight hero in my kitchen!

Okay, so the very first time I tried to make this Low Carb Chicken Casserole, I got a little too enthusiastic with the heavy cream. I mean, more cream, more creamy, right? Wrong! It ended up being less a casserole and more a savory chicken soup with chunks. Oops! It still tasted good, but it certainly wasn't the thick, bubbly dream I was going for. Lesson learned: follow the measurements, even if your heart says 'more cream!'

Gathering the Goodness: What You'll Need for This Low Carb Chicken Casserole

  • 1 1/2 lbs boneless, skinless chicken breasts: This is our star, hon! I love using boneless, skinless breasts because they cook quickly and absorb all that creamy goodness. Sometimes I'll even use rotisserie chicken if I'm feeling extra lazy just shred it up! For this Low Carb Chicken Casserole, you want nice, even pieces so every bite is packed with tender chicken. It’s the foundation of everything delicious we’re building here, so don't skimp on quality!
  • 1/2 cup diced yellow onion: Oh, the humble onion! It's not just filler, it's the aromatic base that sets the stage for all the other flavors. When it softens and turns translucent, it releases this amazing sweetness that's just essential. Honestly, I used to hate dicing onions (hello, teary eyes!), but a sharp knife and a quick chop make all the difference. It's the unsung hero that deepens the flavor of our creamy sauce.
  • 2 cloves garlic, minced: Garlic, my love! Can you even cook without it? I think not! Freshly minced garlic brings such a pungent, wonderful aroma and taste. It's that little kick that elevates everything. Don't be tempted by the pre-minced stuff in a jar, the fresh cloves are worth the extra minute of chopping. Trust me, you'll smell the difference when it hits the pan it’s pure magic in this Low Carb Chicken Casserole.
  • 8 oz cream cheese, softened: This, my friend, is where the 'creamy' in our casserole really comes from. Softened cream cheese melts into the most luscious, velvety sauce imaginable. Just make sure it's at room temperature, or you'll end up with little lumps and nobody wants lumpy cream sauce! It adds that incredible richness and body that makes this dish so satisfying and comforting.
  • 1/2 cup heavy cream: Another secret weapon for that dreamy texture! Heavy cream adds an unparalleled richness and silkiness that just coats your tongue. It’s what makes this casserole feel so decadent, even though it's low carb. I've tried using half-and-half in a pinch, but it just doesn't deliver the same luxurious mouthfeel. Go for the good stuff, you won't regret it!
  • 1/4 cup full-fat sour cream: Sour cream isn't just for topping! In this recipe, it adds a lovely tang and a bit of extra body to our creamy sauce, balancing out the richness of the cream cheese and heavy cream. It brings a subtle brightness that cuts through the savory notes, making each bite more dynamic. Just make sure it's full-fat for the best texture and flavor.

Whipping Up Your Low Carb Chicken Casserole: Step-by-Step Guide

Step 1: Preheat & Prep Chicken:
First things first, get that oven preheating to 375°F (190°C). While it's warming up, let's tackle the chicken. I like to cut my chicken breasts into bite-sized cubes, about 1-inch pieces. This ensures they cook evenly and you get a nice chunk of chicken in every spoonful of our Low Carb Chicken Casserole. Season them generously with a pinch of salt and pepper. Don't be shy here, seasoning layers are key to deep flavor!
Step 2: Sauté Aromatics:
Now for the good smells! Heat a tablespoon of olive oil in a large skillet over medium heat. Toss in your diced yellow onion and let it soften, stirring occasionally, for about 5-7 minutes until it's translucent and fragrant. Then, add your minced garlic and cook for just another minute until it’s super aromatic but don't let it burn! This forms the delicious foundation for our creamy Low Carb Chicken Casserole.
Step 3: Create Creamy Sauce:
Time for the magic! Reduce the heat to low. Add your softened cream cheese, heavy cream, chicken broth, sour cream, dried thyme, garlic powder, and onion powder to the skillet. Stir, stir, stir until everything is wonderfully combined and the cream cheese has melted into a smooth, luscious sauce. It should be thick and velvety. This is the heart of your Low Carb Chicken Casserole, so make it dreamy!
Step 4: Combine Casserole Base:
Once your sauce is silky smooth, gently fold in your prepped chicken cubes. Make sure every piece of chicken is coated in that gorgeous, creamy mixture. This is where all those flavors start to meld together, promising a comforting dish. Give it a taste here adjust salt and pepper if you need to. It should be savory and inviting, ready to become the most amazing Low Carb Chicken Casserole.
Step 5: Assemble & Top:
Pour the entire chicken and sauce mixture into a 9x13 inch baking dish. Spread it out evenly. This is where you can get creative with toppings if you wish, but honestly, it’s perfect as is. I often sprinkle a little extra cheese maybe some shredded cheddar or Monterey Jack over the top for an extra golden crust. It’s going to be so bubbly and beautiful!
Step 6: Bake to Golden:
Pop that dish into your preheated oven. Bake for 25-30 minutes, or until the casserole is bubbly around the edges and the top is lightly golden. The chicken will be cooked through and tender, and the sauce will be thick and irresistible. Every time I pull this out, the smell alone makes my mouth water. This casserole is almost ready for its close-up!

Cooking this Low Carb Chicken Casserole is such a joy for me. It’s one of those recipes that feels fancy but is secretly super easy. I love the way the kitchen fills with the scent of thyme and garlic as the sauce simmers. It’s a dish that brings everyone to the table, eager for a taste of that creamy, comforting goodness. Seriously, it's a hug in a bowl!

Keeping Your Low Carb Chicken Casserole Fresh: Storage Secrets

Got leftovers? Lucky you! This Low Carb Chicken Casserole stores beautifully. Once it's completely cooled, transfer it to an airtight container. It’ll keep in the fridge for 3-4 days, no problem. I’ve definitely made the mistake of trying to put a warm casserole straight into the fridge once oops! It creates condensation and can make things a bit watery, so patience is key. For reheating, I usually pop individual servings in the microwave or cover the dish with foil and warm it in the oven at 300°F (150°C) until heated through. It's still just as delicious, maybe even more so, the next day!

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Creamy Low Carb Chicken Casserole - Image 1 | Recipes By Megan

Mix It Up! Ingredient Swaps for Your Low Carb Chicken Casserole

Life happens, and sometimes you don't have every ingredient on hand. I've done my fair share of experimenting with this Low Carb Chicken Casserole! If you're out of chicken breasts, boneless, skinless thighs work great too, just adjust cooking time if needed. No sour cream? Greek yogurt (full-fat!) can step in for a similar tang and thickness. I've even swapped out thyme for a bit of dried oregano or an Italian seasoning blend when my herb jar was looking sparse. For a different veggie kick, a handful of fresh spinach or some sautéed mushrooms can be folded in with the chicken. Don't be afraid to play around, that's the fun of home cooking!

Pairing Perfection: How to Serve Your Low Carb Chicken Casserole

Okay, so you've got this glorious Low Carb Chicken Casserole bubbling hot from the oven now what? Honestly, it’s a meal in itself, but I love pairing it with something fresh to cut through the richness. A simple side salad with a light vinaigrette is my go-to. Think crisp mixed greens, a few cherry tomatoes, and a cucumber slice or two. If you want a bit more green, some steamed broccoli or roasted asparagus makes a fantastic low-carb companion. For those who aren't carb-counting, a side of cauliflower rice or even a small scoop of regular rice would be lovely. Just think fresh and vibrant to complement that creamy goodness!

The Comforting Roots of Low Carb Chicken Casserole

You know, casseroles are such a staple of American comfort food, aren't they? They speak of potlucks, family dinners, and cozy evenings. This Low Carb Chicken Casserole, while a modern twist, really channels that same spirit. It's about bringing simple ingredients together in one dish, baking it until bubbly, and sharing that warmth. Growing up, my grandma always had some kind of casserole baking, filling the house with delicious smells. This recipe feels like a nod to those traditions, adapted for today's health-conscious eaters. It's a taste of home, reimagined.

And there you have it, my friends! Your very own Low Carb Chicken Casserole, ready to bring comfort and joy to your table. This dish truly proves that healthy eating doesn't mean sacrificing flavor or coziness. I hope it becomes a new favorite in your home, just as it has in mine. Give it a try, snap a pic, and let me know how it turns out in the comments below! Happy cooking!

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Creamy Low Carb Chicken Casserole - Image 2 | Recipes By Megan

Your Burning Questions About Low Carb Chicken Casserole, Answered!

Can I use frozen chicken for this Low Carb Chicken Casserole?

You bet! Just make sure to thaw it completely before cubing and cooking. Using frozen chicken directly might release too much water, making your casserole a bit watery, and nobody wants that in their creamy Low Carb Chicken Casserole. Pat it dry after thawing for the best results!

Is this casserole freezer-friendly?

It is! You can assemble the casserole (without baking) and freeze it, covered tightly, for up to 3 months. Thaw it in the fridge overnight before baking as directed. Or, bake it, cool completely, then freeze individual portions. It's a fantastic meal prep option, making weeknights so much easier.

How can I add more vegetables?

Oh, loads of ways! Sauté some sliced mushrooms, bell peppers, or even a handful of fresh spinach with the onions. You could also stir in some steamed broccoli florets or cauliflower rice with the chicken before baking. Just be mindful of veggies that release a lot of water, like zucchini, as they might thin out your sauce.

What if my sauce is too thin?

No worries, it happens! Sometimes it's due to extra moisture from the chicken or not enough simmering. You can try letting it bake a little longer uncovered, or for a quick fix, stir in a teaspoon of xanthan gum (a low-carb thickener) mixed with a tablespoon of water, then stir it into the hot sauce off the heat until thickened.

Can I make this dairy-free?

That's a bit trickier for this specific recipe, as the cream cheese, heavy cream, and sour cream are central to its creaminess. You could experiment with dairy-free cream cheese alternatives and coconut cream, but the flavor profile and texture will be quite different. I haven't perfected a dairy-free version yet myself, to be real!

Creamy Low Carb Chicken Casserole

Creamy Low Carb Chicken Casserole is a satisfying, easy weeknight dinner. Enjoy tender chicken in a rich, cheesy sauce, perfect for a healthy meal.

4.6 out of 5
(86 reviews)
Prep Time
20 Minutes
Cook Time
35 Minutes
Total Time
55 Minutes

Category: Dinner Classics

Difficulty: Beginner

Cuisine: American

Yield: 6 Servings

Dietary: Gluten-Free, Diabetic-Friendly

Published: March 15, 2026 at 06:28 AM

Ingredients

→ The Savory Core

01 1 1/2 lbs boneless, skinless chicken breasts
02 1/2 cup diced yellow onion
03 2 cloves garlic, minced

→ Rich & Creamy Embrace

04 8 oz cream cheese, softened
05 1/2 cup heavy cream
06 1/2 cup low-sodium chicken broth
07 1/4 cup full-fat sour cream
08 1 tsp dried thyme
09 1/2 tsp garlic powder
10 1/2 tsp onion powder
11 1/4 tsp black pepper
12 Salt to taste

→ Vibrant Greens & Cheesy Crown

13 4 cups broccoli florets, fresh or frozen
14 1 1/2 cups shredded sharp cheddar cheese, divided
15 1/4 cup grated Parmesan cheese
16 2 tbsp fresh parsley, chopped, for garnish

Instructions

Step 01

Preheat your oven to 375°F. Dice 1 1/2 lbs boneless, skinless chicken breasts into bite-sized pieces. Cook the chicken in a large skillet over medium-high heat until no longer pink, then set aside. This prepares the savory core for your Creamy Low Carb Chicken Casserole.

Step 02

In the same skillet (add a little oil if needed), sauté 1/2 cup diced yellow onion until softened, about 3-4 minutes. Add 2 cloves minced garlic and cook for another minute until fragrant, being careful not to burn it.

Step 03

Reduce heat to low. Stir in 8 oz softened cream cheese, 1/2 cup heavy cream, 1/2 cup low-sodium chicken broth, and 1/4 cup full-fat sour cream. Whisk until the sauce is smooth and well combined. Season with 1 tsp dried thyme, 1/2 tsp garlic powder, 1/2 tsp onion powder, 1/4 tsp black pepper, and salt to taste.

Step 04

Return the cooked chicken to the skillet with the creamy sauce. Add 4 cups broccoli florets and 1 cup of the shredded sharp cheddar cheese. Stir gently to ensure all ingredients are evenly coated in the rich sauce. This forms the delicious base of your Creamy Low Carb Chicken Casserole.

Step 05

Transfer the entire mixture into a 9x13 inch baking dish. Sprinkle the remaining 1/2 cup shredded sharp cheddar cheese and 1/4 cup grated Parmesan cheese evenly over the top of the casserole.

Step 06

Bake for 25-30 minutes, or until the casserole is bubbly around the edges and the cheese topping is golden brown and melted. For the best Creamy Low Carb Chicken Casserole, ensure it's heated through completely.

Step 07

Remove the casserole from the oven and let it rest for 5-10 minutes before serving. This allows the sauce to set slightly, making it easier to portion. Garnish generously with 2 tbsp fresh chopped parsley.

Notes

  1. For extra flavor, consider searing the chicken breasts whole before dicing, creating a richer base.
  2. Leftovers can be stored in an airtight container in the refrigerator for up to 3-4 days. Reheat gently in the oven or microwave.
  3. Feel free to substitute broccoli with other low-carb vegetables like cauliflower, spinach, or green beans for variety.
  4. Serve this hearty casserole with a simple side salad dressed with a light vinaigrette to complete your low-carb meal.

Tools You'll Need

  • 9x13 inch baking dish
  • large skillet
  • mixing bowls
  • measuring cups and spoons
  • cutting board
  • chef's knife

Allergy Information

Please check ingredients for potential allergens and consult a health professional if in doubt.
  • Dairy

Nutrition Facts (Per Serving)

It is important to consider this information as approximate and not to use it as definitive health advice.
  • Calories: 502 kcal
  • Total Fat: 36 g
  • Total Carbohydrate: 8 g
  • Protein: 39 g

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Creamy Low Carb Chicken Casserole

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