Caramelized Onion, Mushroom, Apple and Gruyere Bites

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

    This is a must-have appetizer for Thanksgiving or really for any party.

    It looks elegant and at first thought, it probably looked to you like a difficult and time-consuming appetizer to make.

    Well, like I always say, I prefer simple elegance.

    I don’t want to be tucked away in the kitchen for two hours on one dish.

    Simple and delicious is my middle name.

    Why these caramelized onion, mushroom, apple, and gruyere bites are the best appetizers

    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.

    I also love how the puff pastry acted like a light, buttery pillow for the filling on top.

    The flavors are out of this world. They’re the perfect size for the perfect bite!

    Can I prep this ahead of time?

    You can prep the filling ahead of time.

    DO NOT put it on the puff pastry.

    All the liquid from the filling will make your puff pastry soggy and not puffy.

    Prepare the filling and set it aside.

    If I prepped the filling ahead of time, how do I bake these?

    You would defrost the puff pastry then cut into squares then you’d place the filling on top and bake as instructed below.

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

    Do you have to use puff pastry?

    I think it’s the best option since it’s so light, flakey, and buttery!

    Can I use a different cheese?

    Sure. I suggest something earthy and nutty.

    Do you really have to cook the onions for 30 minutes?

    To properly caramelize onions, it definitely takes this amount of time.

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

    I keep reading about adding bacon to these, how and when would you do it and how much?

    Adding chopped up bacon on top of these would make these even more enticing.

    I would add them to the filling mixture and stir together.

    3-4 for slices of bacon chopped up would be great!

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

    Don’t miss me making these caramelized onion, mushroom, apple, and gruyere bites in the video below!

    More appetizer/snack ideas:

    Caramelized Onion, Mushroom, Apple, and Gruyere Bites are the PERFECT appetizer! #thanksgivingappetizer #appetizers #thanksgivingrecipes #thanksgivingmenu #thanksgivingideas #appetizer #recipes

    5 from 1 vote
    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.

  • 153 Comments
    Julie Wampler of Table for Two Blog
    Meet The Author: Julie Wampler
    Dinner for Two Cookbook
    Order My Cookbook!

    Dinner for Two

    Leave a Comment

    Your email address will not be published. Required fields are marked *

    Comments

  • Nina says:

    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. :)

  • Amy says:

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

    • Julie says:

      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.

  • Melinda Kalodimos says:

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

    • Julie says:

      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 :)

  • Jennifer says:

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

    • Julie says:

      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.

  • Flo says:

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

    • Julie says:

      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.

  • Jeanne says:

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

  • Patti says:

    I need these… like… now.
    I (sadly) have never used puff pastry, even though I love it. Wondering if I might be able to use a maple leafs cut-out for the pastry, or if the dough is too delicate to where it may burn on the skinnier end pieces. Thoughts?

    • Julie Wampler says:

      Those would be so pretty! You could maybe do it and then tent with foil if you see that they’re getting to brown?

  • S says:

    how long to bake if I make one large tart instead

    • Julie Wampler says:

      I would bake the same amount of time.

  • Sign-up for Email Updates and Receive a Free E-Cookbook!

    Subscribe to Table for Two