Food / Main Dishes / Vegetarian

Apple Cheddar Flatbread Pizza With Caramelized Onions

Apple Cheddar Flatbread Pizza cut into slices

I wish I could celebrate the first day of October like most—with scarves and boots and a mug of steamy cider! Instead, I’m debating between capri leggings or shorts; I’m hemming and hawing over long sleeves or short sleeves. This is fall in the South.

I guess the trade-off is having a winter that identifies itself more with fall, so… silver linings ;)

To make up for the lack of brisk air lifting the scent of crisp leaves into the air, I’m diving right into seasonal cooking—and this Apple Cheddar Flatbread Pizza With Caramelized Onions is how I’m kicking things off.

Crisp apples. Crunchy walnuts. Caramelized onions. Rich cheddar. And a drizzle of tangy balsamic. These toppers sound fit for an autumnal salad, but I threw them down on some crust for a fall-inspired flatbread instead.

Does it seem a little offbeat to you?

Apple Cheddar Flatbread Pizza being sliced

Typically, when I’m hit with a pizza craving, I need a classic pizza slathered with tangy marinara; a big pie smothered with stretchy cheese and buttons of salty pepperoni. But I do make exceptions.

This past summer, while at a local brewery and restaurant, I dipped my toes into the world of honey-drizzled pizza. Honey! It was eye-opening and amazing. That delicious experience was the push I needed to bring this far-out sweet and savory flatbread to the blog—something I’ve been enjoying behind the scenes myself for the past two years.

Apple Cheddar Flatbread drizzled with balsamic

Apple Cheddar Flatbread Pizza With Caramelized Onions.

Cheddar and apples have been known to get along quite well, and it’s not uncommon to invite some sort of caramelized onion compote to a cheese board, so this recipes makes sense to me. While the walnuts add a fabulous crunch, the balsamic drizzle brings on a tangy hint of sweetness. Something that’s just balanced enough to bring out the best of each component on this pizza. You could eat this pizza without the balsamic, but I highly recommend getting a nice and thick balsamic to drizzle on top. It adds *so* much.

Just note that caramelized onions are a critical component, and doing it properly is also important (and easy).

Pan of caramelized onions

A lot of people, and even recipes I run into online, rush the caramelization process thus resulting in non-caramelized onions. Caramelization is a slow process that melts the onions into sweet, golden threads. The caramelization process lasts at least 30-40 minutes, so don’t confuse it with quickly “browning” onions at high heat, or you’ll end up with a completely different flavor.

Take the time—it’s totally worth it.

If you make this dish, snap a photo and tag me on the Insta @killing__thyme! I love seeing your creations, and you could be featured in my monthly newsletter <3

5 from 13 votes

Apple Cheddar Flatbread Pizza With Caramelized Onions

Celebrate fall and apple season with this Apple Cheddar Flatbread Pizza With Caramelized Onions; it's the perfect weekend treat!
Course Main Course
Keyword apple, balsamic, caramelized onions, caramelized onions, cheddar, flatbread, pizza, pizza
Prep Time 10 minutes
Cook Time 15 minutes
Total Time 25 minutes
Servings 6 slices
Author Dana Sandonato


  • 1 large pizza shell (homemade or store-bought)
  • 1 TBSP olive oil
  • 1 TBSP butter
  • Kosher salt
  • 1 large sweet onion, thinly sliced into rings
  • 1 cup shredded cheddar, mild or sharp Mild or sharp cheddar melts best; aged cheddar contains less moisture so will act more like parmesan and won't melt as nicely
  • 1 apple; thinly sliced, preferably with a mandolin I used gala apples. Any sweet and flavorful apples will work AKA not a "delicious" apple.
  • 1/2 cup chopped walnuts
  • Drizzle of balsamic vinaigrette (about 2 TBSP worth)


Caramelizing onions.

  • Melt the butter in a medium saucepan over medium-low heat. Add the sliced onions, sprinkle with salt, and toss them to coat. Let them simmer for about 30-40 minutes, stirring occasionally to prevent burning. Low and slow is the method you want to use here. Once the onions have browned and become extremely soft (this will take about 30-40 minutes) you can remove them from the heat.

Flatbread prep.

  • Pre-heat the oven to the suggested time on the pizza shell packaging or, for homemade, see notes.
  • Brush the olive oil all over the pizza crust. Top the pizza with the caramelized onions, followed by the cheese, apple slices, and walnuts. You can sprinkle a little extra cheese on top at this point if desired. (I always do; cheese is my weakness.)
  • Place the pizza in the oven. If store-bought, cook as per the package's directions. If homemade, cooks as per the recipe's directions. You're looking for a golden crust and melted cheese.
  • Remove the pizza from the oven and let it cool for 5 minutes. Once slightly cooled, drizzle balsamic over it, sliced and serve.


*Working with from-scratch dough: Typically you want to bake from-scratch flatbread at 425° F for 7-15 minutes, or until the dough has crisped and turned golden in color. Always double check with the dough recipe you’re using.
**Prep time: This is based on the use of pre-made flatbreads. If you’re making your own from-scratch flatbread, prep time will be up to two hours longer, depending on your recipe, in order to let the dough rise. Keep this in mind when planning!
Apple Cheddar Flatbread with Balsamic Drizzle
Apple Cheddar Flatbread with Balsamic Drizzle


  • […] The combination of apple, cheddar, and caramelized onions is simply divine and this recipe for Apple Cheddar Flatbread Pizza With Caramelized Onions from Killing Thyme is an amazingly savory apple dish. With crisp apples, crunchy walnuts, rich […]

  • […] Apple Cheddar Flatbread Pizza with Caramelized Onions (Killing Thyme) […]

  • Amanda
    October 9, 2018 at 7:03 am

    5 stars
    OMG. I need this flatbread pizza in my life! I too love sweet-savory pizzas with a drizzle of something special like honey or balsamic. The balance of flavors in this flatbread sound absolutely perfect with the caramelized onions, apples, and cheddar. This is fall at its best (even if the temperature outside doesn’t want to cooperate)! Gorgeous photos, too.

  • Marisa Franca
    October 8, 2018 at 8:09 am

    5 stars
    Oh!! This flatbread stole my heart the minute I saw it. Then when I found out all of the ingredients it had — my mouth starting watering. Caramelizing onions take the onions to the stratosphere. And honey? Save me a slice please. Better yet, I’ll make me one.

  • Debra
    October 8, 2018 at 7:00 am

    5 stars
    This looks like a winning combo! So many different flavors and textures, it sounds delish. I like the side note about not rushing the onions….that has happened to me many times and its totally worth taking the extra time to do them right. We are definitely having fall like weather here and I’m all over this one!

  • Tracy
    October 7, 2018 at 10:23 pm

    5 stars
    Oooh honey drizzled pizza sounds divine. So does a winter that feels like fall! Do you think a little drizzle on honey with the balsamic for this pizza would be good?

  • Carmy
    October 7, 2018 at 11:43 am

    5 stars
    Those caramelized onions are calling my name! The flavour combination here sounds fantastic and I sure I can eat the whole pizza by myself! I haven’t made pizza in a while so I can’t wait to try this recipe out.

  • Tina
    October 7, 2018 at 11:24 am

    5 stars
    I love the combination of these flavors, the caramelized onions really take the cake here. Your explanation of the onions caramelizing is very helpful. Apple and cheddar really do go well together. This pizza looks so interesting and delicious. Definitely going to have to make this. Thanks so much for sharing another great recipe, this is fantastic:)

  • Anne|Craving Something Healthy
    October 6, 2018 at 9:35 pm

    What a great combination of flavors for a pizza! Perfect for a light dinner or party appetizer!

  • Traci
    October 4, 2018 at 1:35 pm

    5 stars
    Oh I am loving this flatbread pizza! The apples and cheddar get it off to the right start, but those caramelized onions…over the top! The balsamic drizzle seals the deal for me. Just pinned this gorgeous number and can’t wait to try it out!

  • Lisa
    October 4, 2018 at 9:31 am

    5 stars
    I hear you about “fall in the South”. In South Florida, it will be 85° and humid clear through Thanksgiving… That’s ok. Crank up the A/C and lay out this fabulous flatbread. I am totally into the caramelized onion and apple combo and while I think this would make a great appetizer for guests with a glass of wine, selfishly — I can see myself eating this for dinner by myself…

  • Donna
    October 2, 2018 at 11:43 pm

    5 stars
    This is amazing, I love this combination of ingredients! I am with you on wanting Fall to be here, and celebrating it despite the cool weather staying away :( I roughed it out with jeans and a shirt today when really it was shorts and t-shirt weather!

    • Killing Thyme
      October 3, 2018 at 9:18 am

      Thanks so much, Donna! Haha, you sound *just* like me, Donna. I dressed for fall last night when we went to dinner and it was 80 degrees. I’m just gonna pretend… :|
      I’ll get a taste this weekend as I’m headed out to Portland, ME. Very much looking forward to feeling some sort of cool breeze on my face!

  • Gloria
    October 2, 2018 at 5:15 pm

    5 stars
    Oh my….what a delicious looking pizza. Such a fun twist on traditional pizza. Love ALL the flavours happening here. I think I just might have to give this recipe a try for our anniversary weekend. Now….what wine shall I choose from the cellar??

  • Melissa
    October 2, 2018 at 2:47 pm

    5 stars
    I love apple with caramelized onions. And cheese! This looks amazing! The onions can take a while, but definitely makes a huge difference when they are done right!

  • Dawn
    October 2, 2018 at 1:03 pm

    5 stars
    Loves me some pizza and especially caramelized onions. They are always worth the effort. I could devour these whole pie (well most of it) Friday night for dinner with a glass of vino or beer. YUM!

  • Sarah
    October 1, 2018 at 8:58 pm

    5 stars
    It’s still hot here too! We do get winter, but fall usually arrives late October for us. I’m mentally pretending it’s fall anyway, and this pizza looks FABULOUS! I love honey on pizza!


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