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    Home » Dinner » Appetizers

    Seafood Stuffed Mushrooms

    Published: Mar 24, 2019 · Modified: Nov 10, 2023 · 3 Comments

    This post contains affiliate links. As an Amazon Associate I earn from qualifying purchases.

    Jump to Recipe Save Recipe Saved!

    These seafood stuffed mushrooms with are made with spicy sardines and baby portobello mushrooms, and topped with an easy mustard dressing.  They're easy, delicious, and perfect as a side dish or appetizer.

    seafood stuffed mushrooms on a serving platter.

    Lately, almost every dinner at my house includes...

    A side of stuffed mushrooms!

    And after serving the extra cheesey blue cheese stuffed mushrooms and goat cheese stuffed mushrooms... I felt the need to be a little healthier.

    As I brainstormed about even more stuffed mushroom ideas, something occurred to me.

    If crab stuffed mushrooms are so popular, why not make a similar version with....

    Sardines!

    These seafood stuffed mushrooms with sardines are a little bit spicy, and a whole lot delicious.

    Love sardines? Check out these posts: How to Eat Canned Sardines and more canned sardine appetizer ideas-- Jalapeño Popper Fish Cakes and Fish Balls: Albondigas de Pescado.

    add sardine mixture to mushrooms.

    Sardine Filling for Seafood Mushrooms

    Start with-- you guessed it-- canned sardines!

    Heads up--I used sardines packed in chili oil, but if you can't find those, check the recipe card notes for directions with unflavored sardines.

    Next, you'll use a fork to mix together the sardines, some plain yogurt, a few breadcrumbs, Old Bay seasoning, herbs and spices, and an egg.

    Spoon the mixture inside baby portobello mushrooms.

    Mushrooms ready to roast.

    Does it Matter How Much Filling I Add to these Seafood Stuffed Mushrooms?

    For each mushroom, fill up the entire cavity (the hole where the stem used to be).

    I like to let the filling overflow a little bit, but that's mostly because it takes less energy than leveling off the mushrooms.

    Plus, the domed filling looks kind of pretty when it gets crispy after baking.

    roasted seafood stuffed mushrooms.

    What Can I Do with Extra Seafood Filling?

    You might have extra filling.

    How much filling you'll use depends on how large your mushrooms are, and how overstuffed your mushrooms are.

    For any extra filling, you can roll the filling into small patties, and broil them for 7-9 minutes until crispy.

    Just like I do for these Mini Sardine Fish Cakes.

    Can I Skip the Vinaigrette?

    You sure can.

    I don't typically serve stuffed mushrooms with sauce, but I just had a feeling that these would be DELICIOUS with a sauce.

    And they are-- I love how the mustard complements the seafood stuffed mushrooms.

    But.

    You can totally skip it if you don't want to make it. These seafood mushrooms are delicious with or without the mustard sauce.

    Serve them as an appetizer or a side dish, and dig in!

    seafood stuffed mushrooms on a serving platter.
    seafood stuffed mushrooms on a serving platter
    Print Recipe Save Recipe Saved!
    4.50 from 2 votes

    Seafood Stuffed Mushrooms with Sardines

    These seafood stuffed mushrooms with are made with spicy sardines and baby portobello mushrooms. They're easy, delicious, and perfect as a side dish or appetizer.
    Author: Sarah Trenalone
    Prep Time5 minutes mins
    Cook Time15 minutes mins
    Total Time20 minutes mins
    Course: Appetizer, Side Dish
    Cuisine: American
    Servings: 20 people
    Calories: 57kcal
    Freezer Friendly?
    No
    Will It Keep?
    1 Day
    Prevent your screen from going dark

    Ingredients

    Seafood Stuffed Mushrooms:

    • 2 tins sardines (~4oz each) packed in chili + oil, oil reserved
    • ½ cup plain yogurt (whole milk)
    • ½ cup Panko breadcrumbs
    • 2 twigs fresh thyme
    • 2 teaspoons Old Bay seasoning
    • 1 egg
    • 2 pints (~20) baby Portobello mushrooms, stems removed

    Mustard Vinaigrette (Optional):

    • ½ lemon, juiced
    • ¼ cup olive oil
    • 1 tablespoon spicy brown mustard
    • pinch sea salt

    Instructions

    • Preheat oven to 400°F.
    • Remove sardines from tin, reserving oil, and place fish in a mixing bowl. Add remaining fish cake ingredients, along with the oil from one tin (about 2 TB) to the bowl.
    • Gently mix all the ingredients together with a fork. Mix until incorporated, and then stop. 
      (Do not use a blender or food processor for this step, because you don't want to purée the fish.)
    • Use a small spoon to add the sardine mixture to each mushroom, filling the space where the stem used to be. 
      Tip: Filling amount is approximate, and the amount you need will depend on the size of the mushrooms you use. 
    • Set the mushrooms on a baking sheet. (You may need to use 2 baking sheets, depending on the size of your mushrooms.)
      Tip: Leave at least 1" in between each mushroom, because the juice that leaks out of the mushrooms as they cook could make the mushrooms soggy if they're too close together.
    • Roast the mushrooms about 20 minutes, or until the mushrooms are tender and the filling is golden.
    • While the mushrooms cook, whisk the vinaigrette ingredients together.
    • Allow mushrooms to cool 1-2 minutes, and serve with vinaigrette on the side (if desired).
    • Prep Mushrooms Ahead: Up to 1 day ahead, stuff the mushrooms, set on a baking sheet, and tent with foil. Wait to roast until just before serving.
      Make Mushrooms Ahead: Up to 1 day ahead, fully cook the mushrooms. Leave them on the baking sheet, and cover with foil. Put them in the refrigerator. When you're ready to serve them, broil the mushrooms 2-3 minutes, or until hot.
      The vinaigrette can be made up to two weeks ahead of time.  Whisk it again just before serving.

    Notes

    Serving size + nutrition information estimates 1 mushroom per person.  Nutrition information does not include optional vinaigrette.
    Sardine Options: Can't find sardines packed with chili?  Try one of these combinations:
    • (Unflavored) Sardines, plus 2 TB chili-infused oil used INSTEAD of the oil in the tin
    • (Unflavored) Sardines packed in olive oil.  Use the oil in the tin (as directed in the recipe) PLUS 1 tsp red chili flakes

    Nutrition

    Calories: 57kcal (3%) | Carbohydrates: 5g (2%) | Protein: 2g (4%) | Fat: 4g (6%) | Saturated Fat: 1g (6%) | Polyunsaturated Fat: 1g | Monounsaturated Fat: 2g | Trans Fat: 1g | Cholesterol: 11mg (4%) | Sodium: 59mg (3%) | Potassium: 170mg (5%) | Fiber: 1g (4%) | Sugar: 2g (2%) | Vitamin A: 26IU (1%) | Vitamin C: 1mg (1%) | Calcium: 20mg (2%) | Iron: 1mg (6%)
    Tried this recipe?Leave a comment and rating below!

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    About Sarah Trenalone

    Sarah is the primary creator at Champagne Tastes. She's a photographer, food writer and traveler, and is certified in Backcountry Kitchen and Backcountry Navigation from the Colorado Outward Bound School and Identifying Wild Plants from Backpacker.

    4.50 from 2 votes

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    Comments

    All commentsI made this
    1. Dawn - Girl Heart Food says

      March 25, 2019 at 8:46 am

      5 stars
      What a fun (and delicious) twist on stuffed mushrooms! Love that you used sardines too! Perfect party app!

      Reply
    2. afra says

      May 26, 2022 at 1:12 pm

      4 stars
      Tasty. I used sardines in water and added some chili flakes to the filling. Used a low fat but creamy local quark - worked great. Nice with a lunch salad

      Reply
      • Alisha Trenalone says

        May 26, 2022 at 1:27 pm

        Glad you enjoyed, thanks for letting us know!

        -Alisha at Champagne Tastes

        Reply
    bio

    Hi, I'm Sarah! I'm a traveler who loves to eat.   Follow along to join me on my next adventure-- in food or on the road.

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