These Gluten-Free Lump Crab Stuffed Portobello Mushrooms are an elegant appetizer or light main course packed with rich seafood flavor, creamy cheese, and savory herbs. Tender portobello mushroom caps are filled with a delicious blend of lump crab meat, Italian cheeses, gluten-free panko, and fresh basil, then baked until golden and finished with a bright lemon basil butter sauce. Perfect for holiday gatherings, dinner parties, or a gourmet gluten-free meal at home, this recipe delivers restaurant-quality flavor with simple ingredients.
Prep Time
20 minutes
Cook Time
30 minutes
Total Time
50 minutes
Servings
2 to 4
1 teaspoon olive oil
1 small sweet onion, finely chopped
2 cloves garlic, minced
1¼ cups cooked lump crab meat, shredded
5 ounces Italian cheese blend, shredded
1 cup Parmesan cheese, shredded
¼ cup gluten-free panko breadcrumbs
1 tablespoon Italian seasoning
2 large portobello mushrooms
½ cup fresh basil, chopped and divided
4 tablespoons unsalted butter
Juice from ½ lemon
Salt and black pepper, to taste
Prepare the Crab Filling
Preheat your oven to 350°F.
Heat the olive oil in a skillet over medium heat. Add the chopped onion and sauté for about 5 minutes, stirring occasionally, until softened and translucent.
Add the garlic and cook for 1 minute more, stirring constantly until fragrant. Remove the skillet from the heat and allow the mixture to cool slightly.
Transfer the onion and garlic mixture to a large mixing bowl. Add the lump crab meat, Italian cheese blend, Parmesan cheese, gluten-free panko breadcrumbs, Italian seasoning, and half of the chopped basil. Season lightly with salt and black pepper if desired. Stir until everything is evenly combined.
Prepare the Portobello Mushrooms
Gently wipe the mushrooms clean with a damp paper towel. Remove the stems and carefully scrape out the dark gills using a spoon to create more room for the filling.
Lightly brush the mushroom caps with olive oil and place them on a lightly greased baking sheet or baking dish.
Stuff and Bake
Divide the crab mixture evenly between the mushroom caps, pressing gently to fill each mushroom generously.
Place the stuffed mushrooms in the preheated oven and bake for 20 to 25 minutes, or until the filling is hot and bubbly and the tops are lightly golden brown.
Make the Lemon Basil Butter Sauce
While the mushrooms are baking, add the butter, lemon juice, and remaining chopped basil to a small saucepan.
Heat over low heat until the butter is completely melted. Stir gently to combine the flavors. Do not allow the sauce to boil.
Remove from the heat and keep warm until ready to serve.
Serve
Once the mushrooms are finished baking, remove them from the oven and allow them to rest for 2 to 3 minutes.
Transfer to serving plates and drizzle generously with the warm lemon basil butter sauce. Garnish with additional fresh basil and Parmesan cheese if desired.
Serve immediately while hot.
For the best flavor, use fresh lump crab meat whenever possible. Canned crab can be substituted, but be sure to drain it thoroughly before mixing.
If you prefer a crispier topping, sprinkle additional gluten-free panko breadcrumbs and Parmesan cheese over the mushrooms before baking.
These stuffed mushrooms pair beautifully with a fresh garden salad, roasted asparagus, or gluten-free garlic bread.
For an extra seafood flavor boost, add a teaspoon of Old Bay seasoning to the filling mixture.
Leftovers can be stored in an airtight container in the refrigerator for up to 2 days and reheated in a 325°F oven until warmed through.
