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Our crabmeat stuffed portobello mushrooms combine quality ingredients with simple preparation to create a dish that’s perfect for a special dinner, an indulgent weeknight treat, or a starter for a multi-course meal. Our easy recipe features meaty portobello mushroom caps filled with a savory mixture of lump crabmeat, panko breadcrumbs, sautéed onion and garlic, fresh thyme, zesty lemon juice, and finely shredded mild cheese.
Notes From the MGC Kitchen
We got the idea for this recipe about 15 years ago when a friend of my mom’s served her a version that used store-bought, frozen crab cakes to stuff portobello mushroom caps. She would cook the crab cakes according to the package directions, then chop them up, add some cheese, stuff the mushrooms, and bake them until the mushrooms were tender.
The overall idea is a good one, but since most frozen crab cakes are already fully cooked, the thought of cooking the crabmeat for a third time seemed a bit much. Consequently, we set to work on developing a version that used pasteurized crabmeat and a modified version of our popular crab cake recipe. Thank you, Rita, for the inspiration.
Key Ingredients
This is an overview of the key ingredients for this recipe. Please see the printable recipe card below for the complete listing, including quantities.
- PORTOBELLO MUSHROOM CAPS: When shopping for portobello mushrooms, look for ones that are firm, evenly colored, and free from dark spots or discoloration. Portobellos are often packaged together under plastic wrap, but if you’re able to pick them individually, avoid any that have slimy spots or damaged gills. If they are wrapped, check to be sure there’s no condensation under the plastic. Store portobellos unwashed in the coolest part of your refrigerator and use them within 3 days if possible.
- CRABMEAT: Pasteurized crabmeat can be found in the refrigerated section of your grocer’s seafood department. It’s fully cooked and ready to eat (see our guide to the different varieties below). Unopened, it has a shelf life of six months to a year, so be sure to look for a “use by” date stamp on the container. Once you’ve opened it, though, you’ll want to use it up within a day or two.
- MILD SHREDDED CHEESE: For the best results, we recommend using Muenster or Monterey Jack cheese. Both melt easily and have a mild flavor that complements the crab without overpowering its delicate flavor.
- PANKO BREADCRUMBS: Panko crumbs are crispier and less dense than regular dry breadcrumbs, so they are definitely the better choice for this recipe.
- FRESH LEMONS: Fresh lemon juice in the crabmeat stuffing and extra lemon wedges for serving are essential for this dish. Their fresh citrus flavor cuts through the richness of the crabmeat and cheese.
- FRESH THYME: We really enjoy the earthy, herbaceous flavor of fresh thyme in this recipe. Thyme and mushrooms have a natural flavor affinity which complements the crab nicely.
A Guide to Shopping for Crabmeat
Most grocery stores carry a few varieties of pasteurized crabmeat. Since they can all be pretty pricey, we’ve created this little shopping guide to help you choose the best type for your recipe and make the most of your purchase.
LUMP: Crabmeat labeled as “lump” generally consists of a mixture of small pieces from the jumbo lump area as well as pieces from other areas of the crab’s body. Lump crabmeat has a delicate texture that makes it the perfect choice for making crab cakes.
JUMBO LUMP: Premium crabmeat labeled as “jumbo lump” comes from the two muscles that are connected to the swimming legs of the crab. The pieces are large, with a tender, meaty texture, and sweet flavor. You can certainly use this variety to make crab cakes, but given its hefty price tag, jumbo lump crabmeat is best reserved for dishes like salads, pasta, or cold seafood cocktails.
CLAW: The meat from the claws of the crab is darker in color, stronger in flavor, and not as sweet as lump crabmeat. It’s best used in dishes like soups and dips where the crab flavor needs to stand up to other ingredients.
How To Make Crab Stuffed Portobello Mushrooms
This is an overview of how this recipe is prepared. Please see the printable recipe card below for detailed step-by-step instructions.
PRE-BAKE THE PORTOBELLO MUSHROOM CAPS: Preheat the oven and coat a shallow baking pan with nonstick spray. Remove the stems from the portobello caps and reserve. Scrape the gills from the mushrooms, then brush the caps clean with paper towels. Place the mushrooms on the baking sheet and season with salt and pepper. Bake for 8 minutes, then blot away any liquid that has pooled inside and around the mushroom caps with paper towels. Set aside.
PREPARE THE STUFFING: Dice the mushroom stems and place them in a mixing bowl. Add the crabmeat, panko, onion, garlic, thyme, and lemon juice.
Reserve some shredded cheese for topping, then add the remainder to the crab mixture. Combine, season to taste, then add a beaten egg. Divide the stuffing between the mushrooms and compress it to form a mound in each mushroom cap.
BAKE AND SERVE: Bake the crab-stuffed mushrooms until the crabmeat stuffing is firm and golden brown. Remove from the oven, top with shredded cheese, and return to the oven until the cheese is melted and bubbly. Serve with lemon wedges and a dash of hot sauce if desired.
Frequently Asked Questions For Crab-Stuffed Portobellos
Mushrooms contain a lot of water, which is released during cooking. When making stuffed mushrooms, you’ll want to pre-bake the caps to draw out the water. Some of it will evaporate, and you can blot away the remainder before adding your stuffing.
Crab stuffed portobello mushrooms are a light entrée that pairs well with simple side dishes like roasted asparagus or steamed green beans, a fresh green salad, and slices of crusty bread with butter.
When properly handled, crab-stuffed portobellos can be kept for up to two days and reheated. Be sure they have completely cooled before storing them in an airtight container. When ready to serve, heat them, uncovered, for 10 minutes in a preheated 375°F oven.
Although we don’t recommend it because of potential changes to their texture, you can freeze crab-stuffed mushrooms for up to a month. Allow them to cool completely, wrap them individually in aluminum foil, then place them in a zip-top freezer bag. Defrost in the refrigerator overnight and reheat uncovered in a preheated 375°F oven for 10 to 15 minutes.
Discover More Ways to Cook With Crab
Having some pasteurized crabmeat on hand in your fridge means you’re always ready to whip up a tasty, seafood-based dish with ease. Fully cooked and ready to use straight from the container, it can be used in a wide range of dishes, from salads and dips to simple yet elegant main dishes.
Our easy crab cake recipe is ready in just half an hour and is our favorite way to cook with crab. Another favorite, particularly in summer, is Crab Louie salad, a classic American dish made with fresh ingredients and a unique, tangy dressing. We’ve also created a simple pasta dish made with linguine and lump crabmeat tossed with a light white wine butter sauce and diced fresh tomatoes.
Crab-Stuffed Portobello Mushrooms
Ingredients
- 4 portobello mushroom caps, 3-1/2 to 4" diameter
- 8 oz lump crabmeat, see notes
- 1/2 cup panko crumbs
- 2 tablespoons minced sweet onion
- 1 to 2 cloves garlic, minced (about 1 teaspoon)
- 1 teaspoon fresh thyme leaves, or 1/4 teaspoon dried (see notes)
- 1-1/2 tablespoons lemon juice, freshly squeezed from 1/2 lemon
- 2/3 cup mild shredded cheese, divided (see notes for recommendations)
- 1 egg, lightly beaten
- Salt and freshly ground black pepper
- Lemon wedges, for serving
Instructions
Pre-bake the portobello mushroom caps:
- Preheat the oven to 375°F and coat a shallow baking pan with nonstick spray.
- Remove the stems from the portobello caps and reserve. Using a spoon, gently scrape the gills from the mushrooms, then brush the caps clean with paper towels.
- Place the mushrooms (top side down) on the prepared baking sheet and season lightly with salt and pepper. Bake for 8 minutes, then blot away any liquid that has pooled inside and around the mushroom caps with paper towels. Set aside.
Prepare the stuffing:
- While the portobellos pre-bake, dice the mushroom stems and place them in a mixing bowl. Add the crabmeat, panko, onion, garlic, thyme, and lemon juice.
- Reserve 2 tablespoons of the shredded cheese for topping, then add the remainder to the crab mixture. Combine gently and season to taste with salt and pepper before stirring in the beaten egg.
- Divide the stuffing between the mushrooms and gently compress it to form a slight mound in each mushroom cap.
Bake and serve:
- Bake the crab-stuffed mushrooms for 10 to 12 minutes, until the crab mixture is firm and golden brown.
- Remove from the oven, top each mushroom with a portion of the remaining cheese, and bake for an additional 2 to 4 minutes, until the cheese is melted and bubbly.
- Serve with lemon wedges and a dash of hot sauce if desired.
Notes
Nutrition
Nutrition information is automatically calculated, so should only be used as an approximation.
Can imitation crab may be used in this recipe? I understand it won’t be as flavorful as the real thing just wondering.
Hi Elvira,
I haven’t tried it, but I see no reason why you couldn’t use imitation crab in this recipe. I happen to like the flavor and texture of imitation crab quite a bit and I’d be interested to know how the recipe turns out.
Could I please have the recipe for the clam appetizer? Also, the mushrooms were delicious!
Hi Cheryl,
We’re glad to hear you enjoyed the mushrooms. I’ve sent the recipe to you via email.
This sounds wonderful – I can’t wait to try it. If it’s not too much trouble, would you please email me the clam appetizer mentioned in the comments? Thank you.
Recipe has been sent.
I added bacon and shrimp. It turned out excellent. I used Parmesan for the extra cheese. I also had to cook for longer but I think I over filled them in
Hi Jaime,
The bacon and shrimp sound like tasty additions – thanks for sharing the idea. It’s not surprising that the extra filling may have required a little additional cook time. I’m glad you enjoyed the dish overall though.
I made your recipe, I enjoyed it very much. The only thing was I had to leave the mushrooms in for 5 extra min., Not sure if I over filled the mushrooms. Wondering if a seafood creoal sauce on the side would give it additional taste, however do love the woody flavor.
Hi there,
I think a creole sauce would be a really nice accompaniment for the mushrooms and I would actually consider including a small amount in the crab stuffing itself. Just be careful that the mixture doesn’t become too loose. Let us know if you give it a try.
I made these for dinner tonight. Super simple to make. I would have given 5 stars, but I thought that the thyme was just a little too much. Otherwise, they were very tasty. I will make these again, but cut back or eliminate the thyme.
Hi Holly,
I’m glad you enjoyed the recipe overall. We’re located in Florida and the fresh thyme available to us is pretty mildly flavored. Based on your feedback, I’ll adjust the recipe instructions a bit.
Delicious, I used cheddar cheese for the stuffing, and mozzarella for the topping and sprinkled parsley on top. Only made 2 mushrooms and cut recipe in half, I served with toasted tortilla triangles.My husband loved it.
Hi Lynne,
I haven’t made the stuffed Mushrooms yet but will in the very near future. I’m doing some stuffed mushrooms that aren’t Portabellas first to go with some steaks for me and my wife. The reason I’m writing is that I would like a copy of the recipe you shared with Linda Callahan on March 25, 2023. I would like to give that a try. It is about a Clam Appetizer.
When I try your recipe on Stuffed Crab Portobello Mushroom, I will let you know how they turned out.
Hi Michael,
I sent it to you via email.
Im going to make this for my daughter since she is a vegetarian & doesn’t eat turkey
Thank you for. Also I just read about a clam appetizer may I please have that recipe.
Hi Petie,
I hope your daughter enjoys the dish. I’ve emailed the clam recipe for you.
I like to try new recipes, I read the reviews, and was inspired to try it. Unfortunately, my husband and I were not impressed, just a waste of good crab meat
We’re sorry to hear that you didn’t enjoy this dish, however, personal taste in food is subjective, and occasionally the ingredients we purchase can fall short of our expectations.
Absolutely Deliciouso. Everybody Craved more. So fast a Easy .can u please send us the clam appetizer..
Hi there,
I’m glad to hear you enjoyed this recipe – thanks for letting us know. Check your email for the clam recipe.
Can I make this recipe a day ahead and without baking refrigerate overnight to cook the next day. ?
Hi Linda,
In the past, I’ve cleaned the mushrooms and prepared the crab mixture, refrigerated them separately overnight, then stuffed them right before baking. However, I think you could stuff them ahead of time just as easily and they would be just fine. The only added advice I have for either method is that you might need a couple of extra minutes in the oven because the ingredients are more thoroughly chilled.
I have a similar recipe from my mom it was around 1960. Mom used a beaten egg white and a small amount of cream cheese, everything else in your recipe is the same. Absolutely delicious. I have a ❓. Mom also made an appetizer she called ” clam puffs”! Sooo good. She made a mousse-like consistency with beaten egg whites and chopped clams, I think scallions and fresh parm. On a crostini toasted until barely browned. Have you ever seen a recipe like that? If so I would like to hear from you soon. Thank you, looking forward to more dishes.
Hi Linda,
Thanks for sharing your version of the crab-stuffed portobellos. The beaten egg whites are a nice touch. They’d lighten up the filling a little more. And of course, you can never go wrong with cream cheese.
I did a little research and found a recipe for a clam appetizer that sounds like what you’re looking for. Since I don’t know the source and can’t provide a link or proper credit to the author, I won’t publish it here. I can share it with you directly though, so please check the email address you used to leave a comment.