Lion’s Mane Imperial Casserole: A Savory Delight

Embrace the exquisite flavors of Lion’s Mane Mushrooms with our delectable Lion’s Mane Imperial Casserole. This culinary masterpiece combines the unique taste of Lion’s Mane with a medley of tantalizing ingredients, making it a dish fit for royalty.


  • 1 pound Lion’s Mane Mushrooms
  • 1 Tablespoon Butter
  • 3 Tablespoons Finely Diced Red Pepper
  • 3 Tablespoons Finely Diced Onion
  • 3/4 Cup Mayo (divided, 1/2 cup and 1/4 cup)
  • 1 Teaspoon Dijon Mustard
  • 2 Teaspoons Worcestershire Sauce
  • 1 Egg (lightly beaten)
  • 1 Teaspoon Old Bay Seasoning
  • 1/4 Teaspoon Black Pepper
  • 1/2 Cup Fresh Grated Parmesan Cheese (bagged will work, but not as good)


Preheat the oven to 400 degrees Fahrenheit and generously grease an 8×8 casserole dish to ensure the Imperial Casserole doesn’t stick.

Carefully cut the Lion’s Mane Mushrooms into small, delectable bite-sized pieces, ready to infuse the casserole with their marvelous taste and texture.

In a skillet over medium-high heat, melt the butter and sauté the finely diced red pepper and onion until they become tender and release their savory aroma, taking approximately 5 minutes. Set aside and allow them to cool slightly.

In a large bowl, whisk together the 1/2 cup mayo, Dijon mustard, Worcestershire sauce, beaten egg, black pepper, and the zesty Old Bay Seasoning, creating a delightful blend of flavors. Stir in the cooled vegetables, ensuring every ingredient is perfectly combined.

Gently fold in the Lion’s Mane Mushrooms, coating them entirely with the flavorful mixture, so each piece absorbs the essence of this Imperial dish.

Transfer the exquisite mixture into the prepared casserole dish, spreading it evenly for a harmonious cooking experience.

Embrace the final touch of royalty by spreading the remaining 1/4 cup of mayo over the top of the casserole, adding a creamy richness. Then, sprinkle the fresh grated Parmesan cheese, which will melt to perfection, creating a golden-brown, bubbly crust.

Place the Lion’s Mane Imperial Casserole, uncovered, into the preheated oven. Let it bake for approximately 20 minutes or until it reaches a beautifully browned and bubbling perfection.

Immerse yourself in the regal flavors of the Lion’s Mane Imperial Casserole, where the earthy essence of Lion’s Mane Mushrooms reigns supreme, creating an extraordinary culinary experience you’ll cherish with every luxurious bite.