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Keto Appetizers

Stuffed Mushrooms with Spinach

These keto stuffed mushrooms are a crowd-pleasing appetizer that always disappears first at parties. I've made them countless times, and the combination of savory bacon, creamy spinach, and melted Parmesan stuffed into tender mushroom caps never fails to impress. They're surprisingly simple to prepare and fit perfectly into a low-carb lifestyle. Whether you're hosting a game night or just want a flavorful snack, these bites deliver on taste without the carbs.

15 min Prep time 30 min Cook time 45 min Total time 4 Servings 360 Calories
Stuffed Mushrooms with Spinach

Ingredients

  • tablespoons butter, softened
  • slices bacon
  • (10 ounce) package frozen chopped spinach
  • large mushrooms
  • tablespoons butter
  • tablespoons finely chopped onion
  • cloves garlic, minced
  • /8 cup heavy cream
  • /4 cup grated Parmesan cheese
  • salt and pepper to taste
  • tablespoons melted butter

Instructions

  1. Step 1

    First, I preheat my oven to 400°F and butter a 9x13 baking dish with 2 tablespoons of softened butter. Then, cook the bacon in a skillet until crispy, drain, crumble, and set aside. For the spinach, place the frozen block in a saucepan with a quarter cup of water, bring to a boil, cover, and cook for 10 minutes. Uncover, stir, and drain well. Meanwhile, remove the stems from the mushrooms—don’t toss them! Finely chop the stems to use in the filling. Arrange the mushroom caps in the prepared dish. In a saucepan, melt 3 tablespoons of butter over medium heat. Sauté the chopped onion and garlic until tender, about 5 minutes. Stir in the crumbled bacon, drained spinach, and chopped mushroom stems. Pour in the heavy cream and bring to a gentle boil. Remove from heat, then fold in the Parmesan cheese and season with salt and pepper. The mixture should be thick and creamy. Spoon the filling generously into each mushroom cap, packing it slightly. Drizzle the tops with the remaining 2 tablespoons of melted butter. Bake for 30 minutes until the mushrooms are tender and the tops are lightly browned. Let them cool for a few minutes before serving—they’re hot!

Chef's Tip

I always recommend squeezing the thawed spinach really dry before adding it to the filling; excess moisture can make the mushrooms watery. Also, use freshly grated Parmesan for the best melt and flavor.

Storage Tips

Store leftovers in an airtight container in the fridge for up to 3 days. Reheat in a 350°F oven for 10 minutes to restore crispness; avoid the microwave as it can make them soggy.

Variation Tips

Swap bacon for cooked Italian sausage or add a handful of chopped sun-dried tomatoes for a tangy twist. For a dairy-free version, use coconut cream and nutritional yeast in place of heavy cream and Parmesan. Leftover filling can be baked in small ramekins for a crustless quiche-style dish.

Frequently Asked Questions