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Caramelized Onion, Mushroom, Apple & Gruyere Bites

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Caramelized Onion, Mushroom, Apple, and Gruyere Bites are the PERFECT appetizer!

Caramelized Onion, Mushroom, Apple, and Gruyere Bites are the PERFECT appetizer!

This is a must-have appetizer for Thanksgiving. It looks elegant and at first thought, it probably looked to you like a difficult and time-consuming appetizer to make. Well, like I said last week, for Thanksgiving or any dinner party, I prefer simple elegance. I don’t want to slave away in the kitchen for two hours on one dish. Simple and delicious is my middle name.

While everyone is waiting for the big meal, have everyone snack on these. You should probably make a double batch, too, because I guarantee you they will not last long. The caramelized onions give this appetizer a sweet flavor but when paired with the sautéed mushrooms and tart apple it completes the palette in your mouth. Mixed together with the earthy taste of gruyere cheese – you have yourself a perfect appetizer everyone will love. Since the gruyere cheese is mixed into the onion, mushroom, & apple mixture, it melts beautifully together when baked. It’s bubbly and cheesy goodness.

Caramelized Onion, Mushroom, Apple, and Gruyere Bites are the PERFECT appetizer!

Caramelized Onion, Mushroom, Apple, and Gruyere Bites are the PERFECT appetizer!

I loved how the puff pastry acted like a light, buttery pillow for the filling on top. They just paired so well together and the flavors are out of this world. They’re the perfect size for the perfect bite.

As an after-thought, adding chopped up bacon on top of these would make these even more enticing. Next time I make these for guests, I will definitely be adding pieces of bacon on top or pancetta would work well too.

You need these for your next holiday get-together!

Caramelized Onion, Mushroom, Apple, and Gruyere Bites are the PERFECT appetizer!

Caramelized Onion, Mushroom, Apple & Gruyere Bites
Prep Time
10 mins
Cook Time
1 hr 5 mins
Total Time
1 hr 15 mins
 
You must add these caramelized onion, mushroom, apple, & gruyere bites to your Thanksgiving appetizer list.
Servings: 30 -32
Calories: 240 kcal
Ingredients
  • 2 tbsp vegetable oil
  • 1 large onion, thinly sliced
  • 4 oz baby bella mushrooms, sliced
  • 2 tbsp unsalted butter
  • 1 1/2 granny smith apples, cubed into 1/2-inch cubes
  • 1 tsp granulated sugar
  • 1 1/2 oz grated gruyere cheese
  • 2 tbsp chives, minced
  • 1/2 tsp dried thyme
  • 1: 1 pound package of frozen puff pastry, thawed
  • 1 egg, beaten
Instructions
  1. Preheat oven to 400 degrees. Line baking sheets with silicone baking mats. Set side.
  2. In a large skillet, heat the vegetable oil and cook the onions (with 1 tsp. of salt) until they're golden brown, about 30 minutes. Remove and set aside in a large bowl. In the same skillet, sauté mushrooms until tender, about 5 minutes. Remove and set aside in the bowl with the onions.
  3. In the same skillet, melt the butter and add in the apples with the sugar. Cook until softened, about 10 minutes. Remove from pan and add to the large bowl with onions and mushrooms.
  4. Add the cheese, chives, and thyme to the bowl and stir to combine the mixture well. Season with salt and pepper, to taste.
  5. With a pizza cutter, cut the puff pastry into 2-inch squares and place them on the lined baking sheets. Using a pastry brush, brush beaten egg on the squares.
  6. Using a tablespoon, place filling in the middle of each puff pastry.
  7. Bake for 25 minutes, rotating the pans halfway through and switching the baking sheet on the top rack to the bottom and the bottom to the top, until the pastry is golden brown and crisp.
  8. Let the tarts cool a bit before serving, you don't want people to burn the roofs of their mouths!

Recipe Video

Recipe Notes

Source: Williams-Sonoma

Nutrition Facts
Caramelized Onion, Mushroom, Apple & Gruyere Bites
Amount Per Serving (2 "bites")
Calories 240 Calories from Fat 144
% Daily Value*
Total Fat 16g 25%
Total Carbohydrates 18g 6%
Dietary Fiber 2g 8%
Sugars 4g
Protein 6g 12%
* Percent Daily Values are based on a 2000 calorie diet.

*Nutrition facts are an estimate and not guaranteed to be accurate.

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Posted on November 15, 2012

dinner for two by julie wampler

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  1. Nina
    08/23/2017 at 9:30 am

    Thank you for sharing this delicious recipe! I made these couple of days ago and was delighted how easy and fast they were made. And were sooo good! Looking forward to making them again soon. :)

  2. Amy
    10/05/2017 at 12:07 pm

    These look wonderful.
    I was wondering if you could make these in advance?

    • Julie
      10/05/2017 at 2:21 pm

      Hi, you can make the filling/topping separate but I wouldn’t bake the puff pastry until you’re ready to serve. So, just keep the filling/topping in a separate bowl then when you’re ready to bake..top it on the puff pastry and bake.

  3. Melinda Kalodimos
    11/20/2017 at 1:51 am

    Do you roll out the puff pastry to make bigger sheets? Or just as is once it is thawed??

    • Julie
      11/20/2017 at 10:24 am

      You can but just make sure they aren’t too thin or they’ll get too soggy with the filling and they won’t puff up as much! But I actually just rolled it out as is after it has thawed. I like it thicker and puffier :)

  4. Jennifer
    11/20/2017 at 11:16 pm

    Hi, can I bake these at a lower oven temp for a longer amount of time?

    • Julie
      11/21/2017 at 11:01 am

      Hi, it should be okay but I definitely recommend the higher temperature as that is how I made it and I’m sure that it works out that way.

  5. Flo
    12/09/2017 at 12:14 pm

    Can these be pre made a few hours in advance and just popped back into the hot oven to crisp up ?

    • Julie
      12/09/2017 at 8:50 pm

      Hi, I’ve actually answered this question several times in the comments section. I would make the filling/topping separate but I wouldn’t bake the puff pastry until you’re ready to serve. So, just keep the filling/topping in a separate bowl then when you’re ready to bake..top it on the puff pastry and bake, otherwise it’ll all just get super soggy if you do it ahead of time.

  6. Jeanne
    12/13/2017 at 6:46 pm

    Just made them for a Bunco party and they are easy to make and delicious!

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