Meta description: Learn how to make easy, keto-friendly Spinach and Feta Stuffed Mushrooms — a savory appetizer that’s low in net carbs, high in flavor, and perfect for parties or weeknight entertaining.

Introduction
Spinach and feta stuffed mushrooms are an elegant, crowd-pleasing appetizer that come together quickly while delivering bold Mediterranean flavors. This version is designed with low-carb and keto-friendly ingredients in mind so you can enjoy a rich, cheesy bite without derailing your macros. The filling combines wilted spinach, tangy feta, creamy cheese, garlic and Parmesan, all baked inside meaty mushroom caps until golden and irresistible.

Why you’ll love these stuffed mushrooms

• Low in net carbs, high in flavor — ideal for keto and low-carb diets.
• Quick to assemble and easy to scale for a crowd.
• Versatile: make them ahead, freeze, or adapt with different cheeses or herbs.
• Gluten-free when almond flour is used as a binder/topping.

Ingredients (makes about 12 large stuffed mushrooms; 4 servings — 3 mushrooms per serving)

• 12 large white or cremini mushrooms (about 240 g total)
• 1 tablespoon extra-virgin olive oil (14 g)
• 2 cloves garlic, minced (about 6 g)
• 3 oz (85 g) fresh spinach, roughly chopped
• 4 oz (113 g) feta cheese, crumbled
• 2 oz (56 g) cream cheese, softened
• 1/4 cup (25 g) grated Parmesan cheese
• 2 tablespoons (14 g) almond flour
• 1 large egg (50 g), beaten
• Zest of 1/2 lemon (optional)
• 1/4 teaspoon red pepper flakes (optional)
• Salt and freshly ground black pepper, to taste
• Chopped fresh parsley for garnish (optional)

Instructions

1. Preheat the oven to 375°F (190°C). Line a baking sheet with parchment paper.
2. Clean the mushrooms with a damp cloth and remove stems. Finely chop the stems and set the caps aside.
3. Heat the olive oil in a skillet over medium heat. Add the chopped mushroom stems and cook 2–3 minutes. Add garlic and cook until fragrant, about 30 seconds.
4. Add the chopped spinach and cook until wilted, about 1–2 minutes. Remove from heat and let cool slightly.
5. In a mixing bowl combine the cooked spinach mixture, feta, cream cheese, Parmesan, almond flour, beaten egg, lemon zest, red pepper flakes, salt and pepper. Mix until well combined.
6. Spoon the filling into mushroom caps, pressing gently to mound. Arrange on the prepared baking sheet.
7. Bake 18–22 minutes, until filling is set and tops are golden. If you want more browning, finish under the broiler for 1–2 minutes while watching carefully.
8. Garnish with chopped parsley and serve warm.

Tips for success

• Use dense, large mushroom caps (like large cremini or portobello button-style) so they hold plenty of filling.
• Squeeze excess liquid from cooked spinach to avoid a soggy filling.
• For more crunch and extra flavor, sprinkle an additional teaspoon of almond flour or crushed pork rinds over each stuffed mushroom before baking.
• To make dairy-free (not keto), swap feta and cream cheese for a flavorful plant-based alternative; nutrition will change.

Storage and make-ahead

• Refrigerate cooled leftovers in an airtight container for up to 3 days. Reheat in a 350°F (175°C) oven for about 8–10 minutes.
• To freeze: arrange stuffed mushrooms on a baking sheet and freeze 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.

Nutrition (approximate; per serving — 3 mushrooms)
Note: These are estimates based on the ingredient quantities listed and common nutrition databases. Actual values will vary with brands and exact sizes. Net carbs are calculated as: total carbs − fiber − sugar alcohols.

Per serving (3 stuffed mushrooms)

• Calories: ~240 kcal
• Total carbohydrates: ~6.0 g
• Dietary fiber: ~1.45 g
• Sugar alcohols: 0.0 g
• Net carbs: ~4.5 g
• Total sugars: ~1.7 g (approx.)
• Total fat: ~19.4 g
• Protein: ~12.2 g
• Sodium: will vary (feta and Parmesan contribute most)

Batch totals (entire recipe — 12 mushrooms)

• Calories: ~955 kcal
• Total carbohydrates: ~23.8 g
• Dietary fiber: ~5.8 g
• Sugar alcohols: 0.0 g
• Net carbs: ~18.0 g
• Total fat: ~77.6 g
• Protein: ~48.7 g

Keto/Low-Carb Notes

• Net carbs per serving (~4.5 g) make these stuffed mushrooms an easy, satisfying option for most low-carb and keto meal plans.
• Sugar alcohols are 0 g in this recipe because none of the ingredients contain them; if you substitute any sweetened or processed ingredients, check labels and recalculate.
• If you need to lower carbs further, reduce the amount of feta or cream cheese slightly or make smaller portions (2 mushrooms per serving).

Variations and flavor ideas

• Sun-dried tomatoes and basil for a Mediterranean twist (adds a little more carbs).
• Swap almond flour for 2 tablespoons crushed pork rinds for a zero-carb topping (not vegetarian).
• Add chopped kalamata olives or a pinch of dill to the filling.
• Make them spicier with chopped jalapeño or smoked paprika.

Conclusion
These Spinach and Feta Stuffed Mushrooms deliver big flavor with minimal carbs — a perfect appetizer for holiday gatherings, weeknight dinners, or low-carb entertaining. With easy prep, make-ahead options, and flexible variations, they’re sure to become a staple in your recipe rotation. Try them at your next get-together and see how quickly they disappear!

If you’d like, I can convert the recipe to a different serving size, provide a printable recipe card, or calculate nutrition using a specific brand you use. Which would you prefer?