A warm, creamy, and satisfying casserole that’s low-carb and packed with chicken, veggies, and melty cheese—perfect for a fuss-free, weeknight dinner or meal prep.

Why You’ll Love This Recipe

This casserole is a one-dish wonder: simple to assemble, comforting in flavor, and carb-conscious. With ranch-dressed chicken, garlic, vegetables, and gooey cheese, it’s hearty without the carbs. Plus, it’s perfect for customizing and prepping ahead—just bake and enjoy.

Easy Low Carb Chicken Casserole

Ingredients

Tip: You’ll find the full list of ingredients and measurements in the recipe card below.

For the casserole:

4 cups cooked chicken breast (diced or shredded)
5 cups broccoli florets OR 1 lb frozen spinach, thawed & well-drained
3 cloves garlic, minced
1 cup ranch dressing
½ cup shredded mozzarella cheese
½ cup shredded cheddar cheese

For the topping:

½ cup shredded mozzarella cheese
½ cup shredded cheddar cheese

Optional:

1–3 tsp ranch seasoning mix (for extra flavor)

Directions

Prepare vegetables:
- Broccoli: Preheat oven to 375 °F (191 °C). Boil florets 1–2 minutes until bright, then drain well.
- Spinach: Thaw fully, then squeeze out all excess water.
Combine main ingredients:
In a large bowl (or directly in casserole dish), mix chicken, prepared vegetables, minced garlic, ranch dressing, mozzarella, cheddar, and optional ranch seasoning. Stir until evenly combined.
Assemble:
Transfer mixture (if not already in dish) into a greased 9×13″ casserole dish.
Add topping:
Distribute remaining mozzarella and cheddar evenly over the top.
Bake:
Bake at 375 °F (191 °C) for 20–25 minutes, or until the casserole is bubbling and the cheese topping is melted and slightly golden.
Serve:
Let rest 5 minutes before serving warm. Enjoy!

Servings and timing

Servings: 6
Prep time: 10 minutes
Bake time: 20–25 minutes
Total time: 30–35 minutes

Variations

Veggie swaps: Use cauliflower, green beans, or mixed vegetables in place of broccoli or spinach.
Flavor boost: Stir in 1–3 tsp ranch seasoning mix or ½ tsp garlic powder or onion powder.
Extra crunch: Top with crushed pork rinds, almond flour, or low-carb breadcrumbs before baking.
Cheesy upgrade: Use pepper jack or gouda instead of cheddar for a different flavor profile.
Protein option: Substitute chicken with cooked turkey, ground beef, or sausage.

Storage/reheating

Refrigerator: Store leftovers in an airtight container for up to 4 days.
Freezer: Portion into freezer-safe containers and freeze for up to 3 months.
Reheating: Microwave individual servings or reheat in a 350 °F oven (175 °C) for 10–15 minutes until warmed through.

FAQs

1. Can I make this ahead of time?

Yes—assemble the casserole, cover with foil, refrigerate for up to 24 hours, then bake when ready.

2. What can I use instead of ranch dressing?

Creamy Greek yogurt or sour cream mixed with ranch seasoning works well as a substitute.

3. Do I need to cook the chicken first?

Yes—use cooked shredded or diced chicken (rotisserie chicken works great) for quick prep.

4. Can I use fresh spinach instead of frozen?

Yes—sauté 8 oz fresh spinach until wilted, cool slightly, then squeeze dry before adding to the mix.

5. How low in carbs is this casserole?

Most carbs come from the vegetables and ranch dressing—using broccoli makes it significantly low-carb, likely under 10 g net carbs per serving.

6. Can I skip the cheese topping?

You can—but the melted cheese on top adds a satisfying golden finish and creamy texture.

7. Is this casserole gluten-free?

Yes—if your ranch dressing is gluten-free. Be sure any added seasoning or toppings are safe.

8. Can I make this spicy?

Absolutely—add ½ tsp chili powder, crushed red pepper, or diced jalapeños to the mixture.

9. How can I make it more filling?

Serve alongside a fresh green salad dressed in vinaigrette or over cauliflower rice.

10. What’s the best dish size for baking?

A 9×13″ casserole dish works perfectly; feel free to use an 8×8″ dish for thicker casserole (adjust bake time accordingly).

Conclusion

This Easy Low Carb Chicken Casserole is a go-to for simple, satisfying, and healthy dinners. Juicy chicken, vibrant veggies, and cheesy, creamy sauce come together in one dish—ideal for busy nights or meal prep. Make it your own with your favorite low-carb tweaks and enjoy a deliciously easy dinner!

Ezabella