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Balsamic Mushroom Onion Cheese Bites
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5 from 5 votes

Caramelized Mushroom, Onion, and Cheese Bites

Mushrooms and sweet onions are caramelized with balsamic vinegar, and then baked with cheese on buttery, and flaky puff pastry. These bite-sized appetizers are easy to make and such a crowd pleaser!
Prep Time5 mins
Cook Time30 mins
Total Time35 mins
Course: Appetizer
Cuisine: American
Keyword: Mushroom and cheese bites, Puff pastry appetizer, Puff pastry mushroom bites
Servings: 30 Bites
Calories: 111cal
Author: Amy
Cost: $6


  • baking sheet
  • large skillet
  • knife


  • 17.2 oz puff pastry
  • 8 oz brown mushrooms sliced
  • 1 vidalia onion large size. sliced
  • 3 tbsps water
  • 1/8 tsp black pepper
  • 2 tbsps Modena Balsamic Vinegar
  • 1/4 lb Cooper® Sharp White Pasteurized Process American Cheese


  • Preheat oven to 400°F.
  • Add sliced onion and mushroom to skillet with water, vinegar, and black pepper.
  • Caramelize for 12 minutes until mushrooms and onions take on a deep brown color and are soft. The onions will be translucent.
  • Unwrap, unfold and slice puff pastry into squares.
  • One large baking sheet fits one sheet of squares.
  • Add a small piece of cheese to each puff pastry.
  • Top with 1-2 each of onion and mushroom.
  • Bake for up to 18 minutes. Pastry will be golden-brown and slightly puffy. Cheese will be browned and bubbly as well.
  • Top with fresh dill and enjoy warm.


Nutritional values may differ and are meant to be a guide. 
These cannot be frozen. 


Serving: 1bite | Calories: 111cal | Carbohydrates: 9g | Protein: 2g | Fat: 7g | Saturated Fat: 2g | Cholesterol: 4mg | Sodium: 66mg | Potassium: 62mg | Fiber: 1g | Sugar: 1g | Vitamin A: 38IU | Vitamin C: 1mg | Calcium: 32mg | Iron: 1mg