Portobello & Brie Crostini

Portobello & Brie CrostiniI love appetizers. I love them even more when they’re actually served as appetizers, and not just a part of a huge feast. You know, when you come over to someone’s house and while the table is being set, while the main dishes are being put on the table, you enjoy some appetizers. These are super easy to put together and with some ahead of time preparations, are quick too.

Portobello & Brie Crostini

I used the large portabellos, which in my opinion are ‘meatier’. The sauce was used to spread on the bread before topping it with mushrooms and cheese. If you were making everything ahead, go ahead and assemble them cold, then just pop them in the oven to melt the cheese, heat the mushrooms and crisp up the bread, all at once.

Portobello & Brie Crostini

5 from 1 reviews
Prep time:
Cook time:
Total time:


  • 2-3 large portobello mushrooms, sliced
  • 1 medium onion, diced
  • ¾ cup heavy cream
  • ½ tsp onion powder
  • Salt
  • Pepper
  • Olive Oil
  • Baguette
  • Brie Cheese


  • Tomatoes
  • Dill


  1. Sweat the diced onions on a skillet with some olive oil. Add the mushrooms and cream, cover with lid and allow the mushrooms to cook for 2-3 minutes, stirring occasionally. Open the lid and allow the sauce to reduce and thicken.
  2. Brush the sliced baguette with olive oil and toast in the oven, or in a skillet. Season with salt, garlic powder & pepper to taste. Top the bread with ½ tablespoon of the thickened up sauce, mushrooms and a slice of brie cheese. Season with salt & pepper.
  3. Serve right away.
  4. If preparing ahead, put some sauce on the slices of baguette, top with cheese. Right before serving, put in the oven, turn to broil cycle and allow the cheese to melt.
  5. Garnish with a slice of tomato and some dill.

Nutrition Information

  • Serving size: 20-30 crostinis

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Portobello & Brie Crostini

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  • Hi Marina,
    I just wanted to say thank you for sharing the raspberry macaron recipe! I just made my first macarons using the recipe you posted and they turned out perfect!! My husband and I absolutely loved them. Now I can’t wait to make more macarons.

    This crostini looks delicious, too! I love your photos.

    · Reply
    • Thanks so much! Comments like yours make my day! I already saw your macarons and they turned out perfect!

      · Reply

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