Caramelized Onion, Mushroom & Gruyere Tartlets
Continuing down the road of appetizers, dips and snack food leading up to the Super Bowl, I give you this somewhat “upscale” game day food. Caramelized onions, mushrooms and Gruyere cheese are baked atop circles of puff pastry for a flaky, savory and delicious appetizer. Another occasion that this appetizer would be great for? A baby shower! Fellow food blogger Annie from Annie’s Eats is expecting her second baby in April (a girl!) and a group of bloggers organized a virtual baby shower to celebrate Annie’s bundle of joy, and of course we all brought food to the party! Since appetizers are my second love behind desserts and this is Super Bowl week, I definitely wanted to go that route, and thought that these little tartlets would be something Annie and other ladies at a shower would certainly enjoy. To see all of the great drinks, appetizers, main dishes and desserts that other bloggers contributed to the virtual shower, head on over to Annie’s and Courtney’s blogs for the roundup. For more on the tartlets, keep reading!
One of the great things about these tartlets is that you can cut the circles smaller or larger depending on how many you want to serve or how truly bite-size you want them to be. I did 3-inch circles, but you can definitely adjust depending on your needs.
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These are equal parts sophisticated and easy – the best type of entertaining food in my book. You could even prepare the caramelized onions and mushrooms ahead of time and then assemble and bake right before guests arrive. Perfect for a football game or a baby shower! :)
One year ago: English Muffins
Caramelized Onion, Mushroom & Gruyere Tartlets
Ingredients
- 1 tablespoon olive oil
- 1 large yellow onion, thinly sliced
- 1 tablespoon unsalted butter
- 16 ounces (453.59 g) white button mushrooms, thinly sliced
- 1 clove garlic, chopped
- ½ teaspoon (0.5 teaspoon) dried thyme
- Salt and pepper, to taste
- ¼ cup (60 ml) white wine, can substitute chicken or vegetable broth
- 2 sheets puff pastry, thawed according to directions on package
- 1 cup (132 g) shredded Gruyere cheese, can substitute any variety of Swiss cheese
- 1 egg + 1 tablespoon water, beaten together (for the egg wash)
- Handful of parsley, chopped
Instructions
- Preheat oven to 400 degrees F and line two baking sheets with parchment paper.
- Heat the olive oil in a wide, heavy-bottomed pan over medium-low heat and add the onions. Cook, stirring occasionally, until they begin to caramelize, about 20 minutes.
- Add the butter to the pan. Once melted, add the mushrooms and saute, stirring occasionally, until they are completely soft and all of the liquid evaporates, about 20 minutes.
- Add the garlic and the thyme and saute until fragrant, about 1 minute. Season with salt and pepper to taste.
- Add the wine, scraping the bottom of the pan to pull up all of the browned bits, and cook until all of the liquid has evaporated. Remove from heat.
- Unfold the thawed sheets of puff pastry and cut out circles from the dough, placing them evenly spaced on the baking sheets. Using a very sharp knife, make four small scores around the perimeter of the dough, about ¼ to ½-inch from the edge.
- Top the rounds of puff pastry with a small spoonful of the onion and mushroom mixture, trying to keep the filling within the score marks. Top with the shredded Gruyere cheese. Brush the edges of the dough rounds with the egg wash.
- Bake until the pastry is golden brown, about 15 to 25 minutes. Garnish with fresh chopped parsley.
Did you make this recipe?
Leave a review below, then snap a picture and tag @thebrowneyedbaker on Instagram so I can see it!
Michelle, when you say “Using a very sharp knife, make four small scores around the diameter of the dough, about ¼ to ½-inch from the edge” I’m not clear on what you mean. Did you mean “diameter” or “perimeter”? The word “around” is what’s giving me difficulty. The diameter is a straight line right down the middle, so “around” doesn’t seem to fit. If you mean make scores around the perimeter, 1/4 to 1/2″ from the edge, that makes more sense to me. Of course, this could just be me…
I meant perimeter, I changed it above. Good proof as to why I would have never been a good math major ;-)
Thanks, Michelle, for the clarification.
Oh goodness, these are PERFECT for the Super Bowl this weekend. Yum!!
Look delicious.. I wish I was eating them now…
I am unsure what you mean by “four small scores around the diameter of the dough.” Can you elaborate and/or post a picture of this step? Thanks!!
Hi Carol, Unfortunately I don’t have a photo of it, but I basically make four small semi-circle slits on each side of the dough round. You don’t want to cut the whole way through. I found this post with a photo of scored puff pastry, hopefully that helps!
http://veggieobsession.blogspot.com/2010/03/spinach-pear-and-gorgonzola-tart.html
Thanks for asking & answering this question! I needed to know as well!
PS – I’m making these tonight!!
These look absolutely delicious. Love all the ingredients….
Whoa, these look amazing! Big problem is that I can eat too many of these!!
These look absolutely gorgeous. What a perfect appetizer!
Mmm, these look so flaky and beautiful, Michelle! A perfect shower appetizer! This shower has been SO much fun and I’m so happy to have been a part of it! :)
These look SO good! I’m compelled to put these on my weekly menu for next week. MUST HAVE THEM FOR MYSELF! Seriously, if I have another baby, I think I need to fly you out so you can make food for my baby shower… :)
These look so yummy!!
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Mateja @Indulging Life
What an elegant and easy appetizer! Those are just beautiful. I might save them for the Valentine’s Day party I’m having with my husband and friends. Thanks!
Wow, Michelle! I’m bookmarking these, possibly for the Superbowl. But, I’m thinking I want to just make them when I can eat all of them instead and not have to share! :)
Love these perfect little bites! That combination of mushrooms, caramelized onion and Gruyere is just about my favorite. I’d pass right by the desserts to get to this little appetizer. Great job!
perfect choice for a shower. they really look fantastic!
Oh, these look SO good. While reading Courtney’s post, I kept wishing this shower were a non-virtual occasion. :)
Fabulous! Can’t wait to try these.
I have these saved from Kevin’s blog, too. Pretty much all my ingredients on top of buttery puff pastry. Um, yes please!
YUM! That is all I have to say:)
I love anything with onions and cheese. These are beautiful. I want to reach right in and pick one up from my computer screen. And I love the fact that it’s a vegetarian option for an appetizer. I am adding these to my growing list of amazing must-do’s from this virtual shower!
Shanon :)
yum! These are the type of appetizers you make for the wives of the men watching football! The boys can just have chips.
These are pretty much all of my favorite things packed into one recipe. They look so elegant and delicious, and I’ll definitely be trying them soon. Thanks again for participating in the virtual shower! :)
All of the food at her virtual shower looked amazing and I’d definitely like to eat these in real life!
These seem like they’re tailor-made for my mushroom & gruyete-loving husband. I’m printing this and may make them for V-Day!
Stunning photos! SU’d!!
These look wonderful! Perfect app. I am starring this one!
Caramelized onions and gruyere are two of my FAVORITE ingredients. Bookmarking these!
Those look delicious! They seem so elegant but also something that would keep men happy!
Those tartlets look mervelous and soooo appetizing! A great combination.
Cheers,
Rosa
Oh yum! These look perfect for my Superbowl line up! But I’m sure they would also go great at a baby shower ;-)