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Caramelized onion crostini with mushrooms. Another great appetizer idea. | joeshealthymeals.com

Caramelized Onion Crostini with Mushrooms

Perfect appetizer for the upcoming holiday season.
Course Appetizer
Cuisine American
Keyword caramelized onion crostini with mushrooms
Prep Time 15 minutes
Cook Time 55 minutes
Total Time 1 hour 10 minutes
Servings 10 appetizers
Calories 155kcal
Author Joe Boyle


  • 3 medium yellow onions thinly sliced
  • 2 tbsp vegetable oil divided
  • 1/2 tsp salt
  • 10 slices thin sliced baguette toasted
  • 1 tsp olive oil
  • 2 oz. softened cream cheese
  • 2 oz. button or baby bella mushroons cleaned and 1/4 inch sliced
  • 1 large garlic clove minced
  • 2 tbsp chopped parsley


  • Add 1 tbsp veg. oil to a heavy skillet on simmer or very low heat, add onions and stir to lightly coat with oil. Sprinkle lightly with salt, 1/4 tsp. Cook stirring every 5 minutes until opaque and lightly browned, 30 to 45 minutes. Remove the onions and keep warm.
  • Wipe the skillet clean then add 1 tbsp veg. oil heat on med. high to high heat, add the sliced mushrooms, and 1/4 tsp. salt.  Cook, turning occasionally until browned, 6 to 8 mins. Remove from the heat and allow to cool slightly, then add garlic and 1 tbsp chopped parsley, stir in, 1 minute. Remove mushrooms, chop into small pieces, and keep warm.
  • Wipe out the skillet again and put on stove on medium heat. Very lightly brush olive oil on both sides of the bread and place in the skillet, (2 batches). Toast the first side, about 2 minutes, turn to toast the second side.
  • Spread the crostinis with cream cheese. Use your fingers or a fork to add caramelized onion, then add mushroom pieces. Sprinkle with the remaining parsley. Serve warm. 


Calories: 155kcal