I just pulled a skillet of these incredible Longhorn Stuffed Mushroom Recipe out of the oven, and my kitchen smells absolutely divine.

I’ve always been a huge fan of the appetizer at Longhorn Steakhouse, so I had to figure out how to recreate that cheesy, savory magic at home.

This copycat recipe is everything I hoped for and more; it’s so rich, creamy, and topped with the most perfect golden-brown crunch.

Seriously, these are so easy to make, and I promise they taste just like the restaurant version. They are the perfect impressive-looking appetizer for any occasion.

Ingredients

This recipe comes together with a combination of fresh ingredients and pantry staples to create a truly decadent appetizer. Using high-quality components will make a noticeable difference.

16 oz white button mushrooms – These are the perfect vessel, sturdy enough to hold the filling. Look for mushrooms that are firm and smooth.
1/4 cup breadcrumbs – Italian-style breadcrumbs add a bit of seasoning, but panko will give you an even crunchier topping.
3 tbsp butter, melted – Melted butter mixes with the breadcrumbs to create a rich, golden-brown crust when broiled.
1/4 tsp coarse sea salt & 1/4 tsp black pepper – To season the breadcrumb topping.
1.5 cups white cheddar cheese, grated – Grating your own cheese from a block is a must! Pre-shredded cheese has anti-caking agents that prevent it from melting as smoothly.
3 tbsp salted butter (for sauce) – The base for our rich and creamy homemade Alfredo.
1 tsp minced garlic – Freshly minced garlic provides the best flavor, but jarred minced garlic works in a pinch.
2 tsp flour – This acts as a thickener for the Alfredo sauce, creating a smooth, velvety texture.
1 1/3 cup half-and-half – Provides the perfect creamy consistency for the sauce without being as heavy as heavy cream.
2/3 cup Parmesan cheese, grated – For the best results, use a wedge of real Parmigiano-Reggiano and grate it yourself. It adds a nutty, salty flavor that is essential for a good Alfredo.

Note: These ingredients will make enough for about 6 servings, perfect for a small gathering or appetizer course.

Variations

One of the best parts about a copycat recipe is that you can tweak it to your liking. Here are a few simple variations to try.

Add some protein: For a heartier version, mix in finely chopped cooked bacon or crumbled Italian sausage into the Alfredo sauce before filling the mushrooms.
Extra Creaminess: For an even richer filling, stir a couple of ounces of softened cream cheese into the Alfredo sauce until it’s completely smooth.
Spice it up: Add a pinch of red pepper flakes or a dash of cayenne pepper to the Alfredo sauce for a subtle background heat.
Herbaceous flavor: Mix in a tablespoon of fresh chopped parsley or chives into the breadcrumb mixture for a pop of freshness and color.

Longhorn Stuffed Mushroom Recipe — Credit: Pinterest

Cooking Time

Prep Time: 15 minutes
Cook Time: 13 minutes
Total Time: 28 minutes

Equipment You Need

Cast Iron Skillet: Ideal for baking and serving, as it retains heat well and provides an even cook.
Small Saucepan: For making the homemade Alfredo sauce on the stovetop.
Whisk: Essential for creating a smooth, lump-free Alfredo sauce.
Mixing Bowl: To combine the breadcrumbs and melted butter for the crunchy topping.
Cheese Grater: For shredding fresh white cheddar and Parmesan cheese for the best melt and flavor.

How to Make Longhorn Stuffed Mushroom Recipe?

Creating this restaurant-quality appetizer at home is surprisingly simple. Following these steps will ensure your stuffed mushrooms are a certified hit.

Prepare the Mushrooms and Topping

First, preheat your oven to 375°F and lightly spray a cast-iron skillet with nonstick spray. To clean the mushrooms, gently wipe them with a damp paper towel; avoid soaking them in water as they can become soggy. Carefully remove the stems and set the mushroom caps aside. In a separate mixing bowl, combine the breadcrumbs, melted butter, salt, and pepper. Stir until the breadcrumbs are evenly coated, then set this mixture aside.

Make the Alfredo Sauce

Now, let’s make the creamy sauce. In a small saucepan over medium heat, melt the 3 tablespoons of butter. Add the minced garlic and cook for about 30 seconds until fragrant, then whisk in the flour to form a paste. Slowly pour in the half-and-half, whisking continuously to prevent lumps. Add the grated Parmesan cheese and continue to simmer and whisk until the cheese is melted and the sauce has thickened into a creamy consistency.

Assemble and Bake

It’s time to put it all together. Spoon about half of the warm Alfredo sauce into the bottom of your prepared cast iron skillet. Arrange the mushroom caps on top of the sauce. Spoon the remaining Alfredo sauce over the mushrooms, ensuring they are well-covered. Sprinkle the grated white cheddar cheese over everything, then top with the buttered breadcrumb mixture. Bake for 10 minutes, then switch the oven to a low broil for 2-3 minutes until the topping is golden brown. Watch it closely to prevent burning.

Additional Tips for Making this Recipe Better

After making these a few times, I’ve discovered a few little things that take them from great to absolutely perfect.

I can’t stress this enough: grate your own cheese! It makes a world of difference in how smoothly the sauce comes together and how cheesy the final dish tastes.
When cleaning the mushrooms, I just use a damp paper towel. If you rinse them under water, they absorb too much moisture and can become soggy when baked.
Keep a very close eye on the mushrooms when they are under the broiler. They can go from perfectly golden to burnt in a matter of seconds. I usually stand right by the oven door.
Don’t be afraid to use other types of mushrooms. While white button mushrooms are classic, I’ve also made this with baby bellas (cremini) for a deeper, earthier flavor.

How to Serve Longhorn Stuffed Mushroom Recipe?

These stuffed mushrooms are best served hot and bubbly, straight from the oven. They make a fantastic appetizer for a dinner party or a savory side dish to accompany a steak dinner. For presentation, garnish with a sprinkle of fresh, finely chopped parsley to add a touch of color and freshness that cuts through the richness. Serve them directly in the cast iron skillet for a rustic, impressive look.

Nutritional Information

This is an estimate of the nutritional values per serving, based on the recipe making 6 servings.

Calories: 371kcal
Carbohydrates: 11g
Protein: 15g
Fat: 31g

Make Ahead and Storage

This recipe is convenient for prepping in advance, saving you time right before your meal.

Make Ahead: You can assemble the entire dish up to 24 hours in advance. Prepare the mushrooms as directed in the skillet, cover with plastic wrap, and store in the refrigerator. Just add about 5-10 minutes to the initial baking time before broiling.

Storage: Store any leftovers in an airtight container in the refrigerator for up to 3 days. The breadcrumb topping may lose some of its crispiness over time.

Reheating: The best way to reheat leftovers is in an oven or toaster oven at 350°F for about 10 minutes, or until warmed through. This will help re-crisp the topping. Microwaving will work but can make the mushrooms softer.

Why You’ll Love This Recipe?

You are going to fall in love with this recipe for so many delicious reasons.

Unbelievably Cheesy: With a homemade Alfredo sauce, grated white cheddar, and Parmesan, this dish is the ultimate comfort food for any cheese lover.
Quick and Easy: From start to finish, this impressive appetizer is ready in under 30 minutes, making it perfect for last-minute company or a weeknight treat.
Perfect Texture Combo: The combination of tender mushrooms, a creamy, velvety sauce, and a crunchy breadcrumb topping makes every bite a delight.
Restaurant-Quality at Home: You can enjoy the taste of a steakhouse favorite without leaving your house. It’s a copycat recipe that truly nails the original flavor.