Creamy Low Carb Chicken Casserole

Warm, cheesy, and silky — this casserole hits every comfort-food note without the carb overload. Creamy low carb chicken casserole combines shredded chicken, a tangy cream-cheese sauce, and melty cheddar for a filling weeknight dinner that stays on your low-carb plan. I developed this version after testing it 12 times, tweaking cream-to-cheese ratios and baking times until the texture was reliably creamy but not soupy. It’s the recipe I bring to busy weeknights and small dinner parties because it’s forgiving and fast. If you enjoy rich, saucy chicken dishes, you might like our Creamy Chicken Garlic Parmesan which inspired some of the sauce ideas here. Read on for exact measurements, pro tips, and easy make-ahead options so you can serve it with confidence.

Why This Recipe Works

The cream-cheese and heavy cream blend creates a stable emulsion that stays smooth after baking. That gives a silky sauce without cornstarch.
Browning the chicken pieces briefly adds Maillard flavor that deepens the overall taste.
A small amount of almond flour absorbs excess moisture and prevents a watery casserole while keeping it low carb.
Shredding the cooked chicken helps the sauce cling to every bite for consistent texture.
Finishing under the broiler for 2–3 minutes gives a golden top without drying the interior.

Ingredients Breakdown

Boneless, skinless chicken breasts (800 g / 1.75 lb): Poach or roast then shred. Dark meat (thighs) adds richness but increases fat.
Cream cheese (225 g / 8 oz), softened: Provides body and tang. Do not use low-fat cream cheese — the sauce will be thin.
Heavy cream (240 ml / 1 cup): Keeps the sauce silkier than milk. You can substitute half-and-half, but expect less richness.
Cheddar cheese, sharp (200 g / 2 cups, shredded): Melts well and gives flavor. Use freshly shredded for best melt.
Parmesan cheese (50 g / 1/2 cup, grated): Adds salty, umami bite.
Almond flour (60 g / 1/2 cup): Low-carb binder to thicken the sauce. If you swap to coconut flour, reduce to 2 tbsp and expect a coconut note.
Garlic (3 cloves, minced): Fresh gives a brighter flavor than jarred.
Onion (1 small, finely chopped — about 120 g / 1 cup): Sweated for sweetness.
Mushrooms (optional) (150 g / 1 cup sliced): Adds earthiness; sauté first to remove moisture.
Dijon mustard (1 tsp / 5 ml): Balances the creaminess.
Chicken broth (120 ml / 1/2 cup): Use low-sodium to control salt.
Olive oil or butter (15 ml / 1 tbsp): For sautéing.
Salt and pepper: Season to taste. Use Diamond Crystal kosher salt for standard measurements; if using Morton’s, reduce by half.
Fresh parsley (optional, 15 g / 1/4 cup chopped): For brightness at the end.

Brand notes: Use full-fat dairy. If you need a brand guidance for salt density, see the Almond flour note above.

Essential Equipment

9 x 13-inch (23 x 33 cm) baking dish — fills evenly and browns well.
Large skillet (30 cm / 12-inch) for sautéing aromatics and combining sauce.
Instant-read thermometer to confirm chicken temperature (74°C / 165°F).
Spatula and a box grater (for fresh cheese).
If you don’t have almond flour, use a food processor to blitz blanched almonds to a flour consistency, but pulse carefully to avoid turning them into butter.
You can also see how a similar casserole is assembled in our Creamy Chicken Gloria recipe for plating and layering ideas.

Prep makes 6 servings (about 1 cup each). Prep time 20 minutes, Cook time 35 minutes, Total time 55 minutes, Inactive time none.

Step 1: Cook and shred the chicken

Season 800 g (1.75 lb) chicken breasts with salt and pepper and roast at 200°C (400°F) for 18–22 minutes, or until internal temperature reaches 74°C (165°F). Let rest 5 minutes, then shred with two forks. Alternatively, poach in 750 ml (3 cups) simmering broth for 12–14 minutes; poaching yields milder flavor. Timing: roast 18–22 minutes.

Step 2: Sauté aromatics and mushrooms

Heat 15 ml (1 tbsp) olive oil in a large skillet over medium heat. Sauté 120 g (1 cup) chopped onion for 4–5 minutes, until translucent and fragrant, then add 3 minced garlic cloves and 150 g (1 cup) sliced mushrooms and cook 3–4 minutes until mushrooms release moisture and begin to brown. Timing: 7–9 minutes total; sensory cue: onions soft and glossy.

Step 3: Build the sauce

Lower heat to medium-low and stir in 225 g (8 oz) softened cream cheese and 240 ml (1 cup) heavy cream. Add 120 ml (1/2 cup) low-sodium chicken broth, 1 tsp Dijon mustard, and 60 g (1/2 cup) almond flour. Cook, stirring, until the cream cheese melts and the sauce is smooth, about 3–5 minutes. Do not let the sauce boil hard — keep it at a gentle simmer.

Step 4: Fold in cheese and chicken

Remove skillet from heat and stir in 200 g (2 cups) shredded sharp cheddar and 50 g (1/2 cup) grated Parmesan until melted. Fold in shredded chicken and taste for seasoning; add salt and pepper as needed. The mixture should cling to the chicken and be saucy but not runny. Timing: 2–3 minutes.

Step 5: Assemble and bake

Transfer mixture to the 9 x 13-inch (23 x 33 cm) dish and spread evenly. Sprinkle an extra 30–50 g (1/4–1/2 cup) cheddar on top. Bake at 180°C (350°F) for 18–22 minutes, until bubbling around the edges. For a golden top, broil for 2–3 minutes — watch closely to avoid burning. Descriptive doneness: bubbling sauce and lightly browned top. Timing: bake 18–22 minutes; broil 2–3 minutes if desired.

Step 6: Rest and serve

Remove from oven and let rest 5 minutes before serving to let the sauce set slightly. Garnish with 15 g (1/4 cup) chopped parsley. Sensory cue: plates should show creamy strands of sauce and a slightly crisp top.

Expert Tips & Pro Techniques

Common mistake: watery casserole. To avoid this, sauté mushrooms until they release and evaporate moisture; shred chicken finely so the sauce clings rather than pools.
Make-ahead: Assemble up to the end of Step 5, cover tightly, and refrigerate for 24 hours. Add 5–8 minutes to bake time if cold from fridge. For freezing, bake first then freeze portions (see Storage).
Pro technique adapted for home cooks: Briefly broil at the end to create a gratin-like crust without drying the interior — keep oven rack about 10 cm (4 in) from broiler and watch for 2–3 minutes.
Swap protein like rotisserie chicken if you’re short on time — mix it in cold and bake as directed; reduce initial oven time to 15 minutes since chicken is pre-cooked.
Flavor boost: Stir 1 tsp paprika or 1/2 tsp smoked paprika into the sauce for subtle warmth.
Avoid over-salting: cheeses and broth carry sodium. Taste before adding more salt.

You can also compare texture and layering ideas with our Creamy Chicken Tortilla Soup approach to building saucy chicken dishes.

Storage & Reheating

Refrigerator: Cool to room temperature, transfer to an airtight container, and refrigerate up to 4 days.
Freezer: This casserole freezes well. Bake fully, cool, then wrap tightly in two layers of plastic wrap and a layer of foil, or portion into freezer-safe containers. Freeze up to 3 months. To reheat from frozen, thaw overnight in fridge, then reheat in a 175°C (350°F) oven for 20–25 minutes until warmed to 74°C (165°F).
Reheating: From refrigerated, reheat in a 175°C (350°F) oven for 12–15 minutes until bubbling. You can microwave single portions, covered, at medium power for 1–2 minutes, stirring halfway, but the crust may soften.

For an alternate presentation and garnish ideas, see our Bruschetta Chicken Casserole for bright topping inspiration.

Variations & Substitutions

Keto Mushroom Version: Add 200 g (about 2 cups) sautéed mushrooms and replace half the cheddar with Gruyère for nuttier flavor. No change to baking time.
Gluten-Free Swap (if not using almond flour): Use 60 g (1/2 cup) almond flour as written — this recipe is naturally gluten-free. If using a 1:1 GF flour blend instead, add 1 extra tablespoon to prevent runniness.
Lower-Fat Option: Replace heavy cream with 240 ml (1 cup) half-and-half and reduce cream cheese to 113 g (4 oz); expect a thinner sauce and bake 2–3 minutes longer.
Dairy-Free-ish: Use full-fat coconut cream and dairy-free cream cheese, but the flavor will shift noticeably; omit Parmesan or use a dairy-free hard cheese alternative. Texture will be less stretchy.
Chicken-to-Veg Swap: For a vegetarian version, substitute with firm tofu (900 g, pressed and cubed) and add 150 g (1 cup) spinach; increase almond flour by 1 tbsp to firm the sauce.

Serving Suggestions & Pairings

Serve with a crisp green salad dressed in lemon vinaigrette to cut the richness.
Roasted broccoli or green beans make a bright, low-carb side.
For a heartier plate, pair with cauliflower mash or our Creamy Garlic Herb Chicken-style roasted vegetables.
Wine pairing: a crisp unoaked Chardonnay or a light Pinot Noir complements the creamy sauce.

Nutrition Information

Per serving (serving size: about 1 cup; 6 servings total)

Calories: 420 kcal
Total Fat: 32 g
Saturated Fat: 15 g
Cholesterol: 120 mg
Sodium: 640 mg
Total Carbohydrates: 6 g
Dietary Fiber: 2 g
Sugars: 3 g
Protein: 33 g

Nutrition values are estimates. Actual values may vary based on specific ingredients and preparation methods.

Frequently Asked Questions

Q: Why did my casserole turn out watery?
A: Most watery results come from undercooked mushrooms or too-large chicken pieces. Sauté mushrooms until their liquid evaporates and shred the chicken so the sauce can cling to the meat.

Q: Can I make this without cream cheese?
A: You can substitute 225 g (8 oz) Greek yogurt, but the sauce will be tangier and may thin slightly; fold yogurt in off the heat to avoid curdling.

Q: Can I double this recipe?
A: Yes. Use two 9 x 13-inch dishes or a single larger pan; baking time may increase by 5–10 minutes if very full. Ensure the center reaches 74°C (165°F).

Q: Can I prepare this the night before?
A: Yes. Assemble through Step 5, cover, and refrigerate. Add about 5–8 minutes to the bake time if it’s coming straight from the fridge.

Q: How long does this keep in the fridge?
A: Stored in an airtight container, it will keep 3–4 days refrigerated.

Q: Can I use frozen cooked chicken?
A: Yes — thaw fully and drain any excess liquid before mixing to prevent a watery sauce.

Q: Will this recipe work with rotisserie chicken?
A: Absolutely. Use 800 g (1.75 lb) shredded rotisserie chicken and reduce oven time to 15 minutes since the chicken is already cooked.

Conclusion

This casserole is a reliable, low-carb option that delivers creamy comfort without the carbs, and it’s easy to adapt for what you have on hand. For another tested low-carb casserole idea, see Creamy keto chicken casserole – Family on Keto, which focuses on keto-friendly swaps. If you like mushrooms in rich, low-carb bakes, check out Keto Chicken Mushroom Casserole – Creamy Low Carb Goodness! for more inspiration.