Keto Chicken and Spinach Stuffed Mushrooms – Easy, Flavorful, and Low-Carb
These Keto Chicken and Spinach Stuffed Mushrooms are a cozy, satisfying bite that checks all the boxes: quick to make, rich in flavor, and totally low-carb. They’re perfect for an appetizer, light lunch, or an easy weeknight dinner with a side salad. The filling is creamy, cheesy, and savory without feeling heavy.
Best of all, you can prep them ahead and bake when you’re ready. If you’re craving comfort food without the carb crash, this recipe delivers.
Keto Chicken and Spinach Stuffed Mushrooms – Easy, Flavorful, and Low-Carb
Ingredients
- 12 large white or baby portobello mushrooms (stems removed)
- 2 cups cooked chicken, finely chopped or shredded
- 2 cups fresh spinach, roughly chopped (or 1 cup frozen, well-drained)
- 4 oz cream cheese, softened
- 1/2 cup shredded mozzarella
- 1/3 cup grated Parmesan (plus extra for topping)
- 2 cloves garlic, minced
- 2 tbsp olive oil (divided)
- 2 tbsp chopped fresh parsley (optional)
- 1 tsp Italian seasoning
- 1/2 tsp onion powder
- 1/4 tsp crushed red pepper flakes (optional)
- Salt and black pepper, to taste
- Lemon zest (optional, for brightness)
Instructions
- Prep the mushrooms: Heat the oven to 400°F (200°C). Wipe mushrooms clean, remove stems, and scoop out some gills if using baby portobellos to create more space.
- Season and pre-bake caps: Place caps on a parchment-lined sheet, drizzle with 1 tbsp olive oil, and season with salt and pepper. Bake for 8–10 minutes to release moisture. Carefully drain any liquid and set aside.
- Sauté spinach and garlic: In a skillet over medium heat, warm 1 tbsp olive oil. Add garlic and cook 30 seconds until fragrant. Add spinach and cook until wilted (or heat frozen spinach until warm). Remove excess moisture.
- Make the filling: In a bowl, combine chicken, cream cheese, mozzarella, Parmesan, spinach, Italian seasoning, onion powder, red pepper flakes, and a pinch of salt and pepper. Mix until creamy. Add lemon zest and parsley if using.
- Stuff the mushrooms: Spoon filling into each cap, mounding slightly. Top with a little extra Parmesan for a golden finish.
- Bake: Return to the oven and bake 12–15 minutes, until the tops are lightly browned and the filling is hot and melty.
- Rest and serve: Let them sit for 3–5 minutes to set. Garnish with parsley and a crack of pepper. Serve warm.
What Makes This Special
- Low-carb and high-protein: Each mushroom is packed with chicken and cheese, keeping you full and on track with keto goals.
- Great texture: Juicy mushrooms, creamy filling, and a lightly crisp top from melted cheese.
- Flexible: Use leftover rotisserie chicken, swap cheeses, or add spice without breaking the macros.
- Meal prep friendly: Make the filling ahead, stuff, and bake when needed.
- Fast and simple: Straightforward steps with basic ingredients and minimal cleanup.
Shopping List
- 12 large white or baby portobello mushrooms (stems removed)
- 2 cups cooked chicken, finely chopped or shredded
- 2 cups fresh spinach, roughly chopped (or 1 cup frozen, well-drained)
- 4 oz cream cheese, softened
- 1/2 cup shredded mozzarella
- 1/3 cup grated Parmesan (plus extra for topping)
- 2 cloves garlic, minced
- 2 tbsp olive oil (divided)
- 2 tbsp chopped fresh parsley (optional)
- 1 tsp Italian seasoning
- 1/2 tsp onion powder
- 1/4 tsp crushed red pepper flakes (optional)
- Salt and black pepper, to taste
- Lemon zest (optional, for brightness)
How to Make It
- Prep the mushrooms: Heat the oven to 400°F (200°C). Wipe mushrooms clean, remove stems, and scoop out some gills if using baby portobellos to create more space.
- Season and pre-bake caps: Place caps on a parchment-lined sheet, drizzle with 1 tbsp olive oil, and season with salt and pepper.
Bake for 8–10 minutes to release moisture. Carefully drain any liquid and set aside.
- Sauté spinach and garlic: In a skillet over medium heat, warm 1 tbsp olive oil. Add garlic and cook 30 seconds until fragrant.
Add spinach and cook until wilted (or heat frozen spinach until warm). Remove excess moisture.
- Make the filling: In a bowl, combine chicken, cream cheese, mozzarella, Parmesan, spinach, Italian seasoning, onion powder, red pepper flakes, and a pinch of salt and pepper. Mix until creamy.
Add lemon zest and parsley if using.
- Stuff the mushrooms: Spoon filling into each cap, mounding slightly. Top with a little extra Parmesan for a golden finish.
- Bake: Return to the oven and bake 12–15 minutes, until the tops are lightly browned and the filling is hot and melty.
- Rest and serve: Let them sit for 3–5 minutes to set. Garnish with parsley and a crack of pepper.
Serve warm.
How to Store
- Refrigerator: Store leftovers in an airtight container for up to 3 days. Reheat in a 350°F (175°C) oven for 8–10 minutes for best texture.
- Freezer: Freeze unbaked stuffed mushrooms on a tray until solid, then transfer to a freezer bag for up to 2 months. Bake from frozen at 375°F (190°C) for 20–25 minutes.
- Make-ahead: Assemble up to 24 hours in advance and refrigerate.
Bake just before serving.
Health Benefits
- Keto-friendly macros: Low in carbs, with healthy fats and protein to support steady energy and satiety.
- Nutrient-dense: Spinach adds vitamin K, folate, and iron; mushrooms bring B vitamins and antioxidants.
- Gluten-free: No breading or flour required, so it fits many dietary needs without substitutions.
- Better portion control: Individual caps make it easy to track servings and macros.
Pitfalls to Watch Out For
- Watery mushrooms: Skipping the pre-bake step can make the dish soggy. Always pre-bake and drain excess liquid.
- Too much salt: Parmesan is salty. Taste the filling before adding extra salt.
- Overcooking: Mushrooms can shrink and dry out if baked too long.
Pull them when the tops are lightly golden and the filling is hot.
- Runny spinach: Squeeze out moisture from cooked or thawed spinach to keep the filling creamy, not watery.
Alternatives
- Protein swaps: Use ground turkey, Italian sausage (check for sugar), or canned chicken for convenience.
- Cheese options: Swap mozzarella for provolone or Monterey Jack; add a little goat cheese for tang.
- Dairy-free: Use a dairy-free cream cheese and mozzarella alternative. Add olive oil or mayo for richness.
- Flavor twists: Stir in sun-dried tomatoes (no sugar added), chopped olives, or a pinch of smoked paprika.
- Mushroom varieties: Baby portobellos (cremini) are sturdy and meaty. Large white mushrooms also work but may release more liquid.
FAQ
Can I use raw chicken?
Yes, but cook it first before mixing into the filling.
Sauté finely chopped chicken in olive oil with salt and pepper until fully cooked, then proceed with the recipe.
What if I only have frozen spinach?
That works. Thaw it completely, then squeeze out as much liquid as possible with a clean towel to prevent watery filling.
How many carbs are in each mushroom?
Exact counts vary by size and brand, but a large stuffed mushroom typically lands around 2–3 net carbs. Check your labels and weigh your ingredients for accuracy.
Can I make these in an air fryer?
Yes.
Air fry at 375°F (190°C) for 8–12 minutes, checking for a golden top and heated centers. Don’t overcrowd the basket.
How do I keep the caps from tipping over?
Trim a thin slice off the bottom of each cap to create a flat base, or nestle them in a rimmed baking dish so they stay upright.
What can I serve with them?
A crisp side salad, roasted asparagus, garlicky green beans, or zucchini noodles pair well without adding carbs.
Can I make them spicier?
Add extra crushed red pepper, a dash of hot sauce, or chopped jalapeños to the filling.
Wrapping Up
Keto Chicken and Spinach Stuffed Mushrooms are a reliable go-to when you want something tasty, filling, and simple. The creamy chicken-and-cheese center with tender mushrooms feels indulgent without the carb load.
Keep this recipe in your rotation for busy nights, meal prep, or your next appetizer spread—easy to customize, and always a hit.
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