Chicken Spinach and Mushroom Low Carb Oven Dish – Easy 1-Pan Wonder

Author: Sharis Mariner

Published: December 7, 2025

lina033321 cheesy baked chicken and spinach casserole in a cl 95c319b2 fbdb 4b15 9d05 afc151cca103 3 - Chicken Spinach and Mushroom Low Carb Oven Dish – Easy 1-Pan Wonder

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Ingredients You’ll Need

Here’s exactly what you’ll need to make this cheesy, low-carb chicken bake.

Main Ingredients

6 thin sliced chicken breasts
1 small bag fresh baby spinach (about 5–6 ounces)
1 large package sliced mushrooms (about 12 ounces – white or cremini)
1 container green onion cream cheese (about 8 ounces)
8 oz shredded mozzarella cheese
1/2 cup chicken broth
1/4 cup olive oil

Seasonings

1 dash pepper (or more to taste)
1 dash Herb and Garlic Seasoning (or your favorite all-purpose chicken seasoning)
Optional: a small pinch of salt if your broth and cheese aren’t very salty

Optional Finishing Touches

Fresh parsley or chives, chopped
Extra green onions, sliced
A sprinkle of red pepper flakes for gentle heat

Tools You’ll Need

You don’t need much to pull off this Chicken Spinach and Mushroom Low Carb Oven Dish:

9×13-inch baking dish (or similar casserole dish)
Mixing bowl
Whisk or fork
Measuring cup
Spoon or spatula
Foil (for covering the dish while baking)

How to Make Chicken Spinach and Mushroom Low Carb Oven Dish

This recipe layers like a lasagna, but without all the fuss.

Preheat the oven and prep the dish
First, preheat your oven to 375°F (190°C).
Then drizzle a little bit of the olive oil into your baking dish and brush or tilt the dish so the bottom coats lightly.
Create the spinach and mushroom bed
Next, spread the fresh baby spinach evenly over the bottom of the dish.
Scatter about half of the sliced mushrooms over the spinach. Because they shrink in the oven, they might look like a lot, but they mellow out beautifully.
Season and arrange the chicken
Place the thin sliced chicken breasts in a single layer over the spinach and mushrooms.
Drizzle the remaining olive oil over the chicken. Then sprinkle the pepper and Herb and Garlic Seasoning evenly over the top. If you like a little extra flavor, add a pinch of salt here as well.
Make the creamy low-carb sauce
In a mixing bowl, add the green onion cream cheese and chicken broth.
Whisk until the mixture turns mostly smooth. A few small bits are fine, and they melt in the oven. If the cream cheese feels very stiff, you can microwave the mixture for 20–30 seconds to soften it and whisk again.
Pour and top with mushrooms and cheese
Pour the cream cheese mixture evenly over the chicken, trying to cover as much surface as possible.
Then scatter the remaining sliced mushrooms over the top. Finally, sprinkle the shredded mozzarella cheese over everything to finish the Chicken Spinach and Mushroom Low Carb Oven Dish.
Bake covered, then uncover to brown
Cover the baking dish with foil.
Bake for about 20 minutes. After that, remove the foil and bake for another 10–15 minutes, or until the chicken cooks through (165°F internal temperature), the spinach wilts, and the cheese turns melted and bubbly.
Rest, garnish, and serve
Carefully remove the dish from the oven and let it rest for 5–10 minutes.
Garnish with chopped parsley, chives, or extra green onions. Then serve generous spoonfuls of this Chicken Spinach and Mushroom Low Carb Oven Dish straight from the pan.

The first time I threw this Chicken Spinach and Mushroom Low Carb Oven Dish together, I honestly felt like I was cheating. I grabbed a bag of baby spinach, a tub of green onion cream cheese, and some mushrooms that were begging to be used, then layered everything into a baking dish and hoped for the best.

Thirty minutes later, the whole kitchen smelled like a cozy little bistro. The chicken turned out juicy, the spinach melted into the creamy sauce, and the mushrooms soaked up all that cheesy, garlicky goodness. My family inhaled it and then asked if there was any pasta to go with it. I just laughed and said, “Nope, this one’s low carb… and you didn’t even miss the noodles, did you?”

Because it bakes in a single pan, this Chicken Spinach and Mushroom Low Carb Oven Dish quickly became one of my “busy weeknight but still want something special” recipes.

What Makes This Recipe Special

Low-carb comfort food: You still get cheesy, creamy, oven-baked flavor without pasta, rice, or breadcrumbs.
One-pan magic: You layer everything in a single baking dish, slide it into the oven, and dinner practically makes itself.
Veggie-loaded but cozy: Spinach and mushrooms add color and texture while the cream cheese and mozzarella keep every bite indulgent.
Perfect for meal prep: Leftovers reheat beautifully, so you can cook once and enjoy this Chicken Spinach and Mushroom Low Carb Oven Dish for days.

lina033321 cheesy baked chicken and spinach casserole in a cl 95c319b2 fbdb 4b15 9d05 afc151cca103 0 - Chicken Spinach and Mushroom Low Carb Oven Dish – Easy 1-Pan Wonder

Quick Low-Carb Swap & Add-In Table

You can easily adjust this dish for different tastes while keeping it low carb.

Ingredient	Low-Carb Swap or Add-In	Result
Chicken breasts	Chicken thighs	Richer flavor, extra juicy.
Mozzarella cheese	Provolone or Monterey Jack	Different melt and flavor twist.
Green onion cream cheese	Plain cream cheese + sliced scallions	Same flavor profile, more control.
Chicken broth	Bone broth	Extra protein and deeper flavor.
Sliced mushrooms	Mix of mushrooms (cremini, shiitake)	Earthier, more complex mushroom taste.

What to Serve With It

Because this Chicken Spinach and Mushroom Low Carb Oven Dish already includes protein and veggies, you don’t need much on the side. Still, a few fun pairings make it feel like a complete feast.

Low-carb “pasta” night: Serve generous spoonfuls over zucchini noodles or alongside a bowl of Creamy Zucchini Noodle Chicken Alfredo for a pasta night without the carbs.
Cozy low-carb plate: Add a side of roasted cauliflower or those dreamy Mushroom Ricotta Zucchini Boats to keep the mushroom theme going.
Hearty cold-weather menu: Start with a comforting bowl of Quick Chicken Mushroom Soup and finish with this baked chicken dish for a full, cozy dinner.
Meal-prep week: Pair a portion of this oven dish with a scoop of Crockpot Crack Chicken Heaven in your containers for different low-carb flavors all week long.

Tips for Perfect Results

Use thin sliced chicken
Thin chicken cooks faster and more evenly. Because you use a creamy sauce and plenty of cheese, the meat stays juicy instead of drying out.
Don’t skimp on mushrooms
Mushrooms shrink in the oven. So when you think you added enough, add just a little more. They soak up the chicken broth and cream cheese and become incredibly savory.
Let it rest before serving
When you let your Chicken Spinach and Mushroom Low Carb Oven Dish sit for a few minutes, the sauce thickens slightly and the cheese settles, so serving gets easier and the flavor deepens.

Storage Instructions

This dish reheats like a dream, which makes it perfect for next-day lunches or low-carb meal prep.

Fridge: Store leftovers in an airtight container in the refrigerator for up to 3–4 days.
Reheat: Warm portions in the microwave in 30-second bursts or in a small baking dish covered with foil at 325°F until hot.
Freezer: Freeze cooled portions in freezer-safe containers for up to 2 months. Thaw overnight in the fridge, then reheat gently.

FAQ – Chicken Spinach and Mushroom Low Carb Oven Dish

1. Is this Chicken Spinach and Mushroom Low Carb Oven Dish keto-friendly?

Yes, this Chicken Spinach and Mushroom Low Carb Oven Dish fits well into many low-carb or keto-style meal plans. Because it relies on chicken, cheese, spinach, mushrooms, and broth, it keeps carbs low while still delivering cozy, cheesy comfort.

2. Can I use frozen spinach instead of fresh?

You can use frozen spinach, but squeeze it very dry first. Otherwise, excess water can thin the sauce. Fresh baby spinach gives the best texture, but frozen works when you want this Chicken Spinach and Mushroom Low Carb Oven Dish in a pinch.

3. What kind of mushrooms work best?

Sliced white or cremini mushrooms both work beautifully. If you feel a little fancy, you can mix in some sliced shiitake or baby bella mushrooms to give the Chicken Spinach and Mushroom Low Carb Oven Dish a deeper, earthier flavor.

4. Can I make this dish ahead of time?

Yes, you can assemble the dish earlier in the day, cover it, and keep it in the fridge. When you’re ready to bake, let the Chicken Spinach and Mushroom Low Carb Oven Dish sit at room temperature for about 15 minutes, then bake as directed, adding a few extra minutes if needed.

5. How do I know when the chicken is fully cooked?

Because the chicken breasts are thin, they usually cook through within the suggested baking time. However, you can use a meat thermometer to check. When the thickest part of the chicken in your Chicken Spinach and Mushroom Low Carb Oven Dish reaches 165°F, you’re good to go.

6. Can I add more veggies and still keep it low carb?

Absolutely. You can toss in extra low-carb vegetables like zucchini slices, bell peppers, or a handful of kale. Just layer them with the spinach and mushrooms. The Chicken Spinach and Mushroom Low Carb Oven Dish stays low carb while getting even more color and nutrients.

Conclusion

This Chicken Spinach and Mushroom Low Carb Oven Dish feels like the kind of meal you’d order at a cozy restaurant, but it comes straight from your oven on a regular weeknight. Because it layers juicy chicken, tender spinach, and savory mushrooms under a creamy, cheesy blanket, everyone at the table gets excited for “healthy” night without even realizing it.

So, pull out a baking dish, grab that bag of spinach and package of mushrooms, and whisk together that simple cream cheese sauce. Then bake this easy one-pan wonder, snap a pic, and share it on TikTok or Instagram. Be sure to tag us so we can see your Chicken Spinach and Mushroom Low Carb Oven Dish in action. And don’t forget to leave a comment and hop on the newsletter so you never miss another fun, low-effort, low-carb favorite.