Caramelized Onion & Gorgonzola Flatbread

This flatbread pizza appetizer is perfect for a party, girls night or just a regular old Friday night in with the family. A simple, homemade flatbread crust is topped with caramelized onion and crumbly gorgonzola and then baked to perfection in a toasty hot oven. Garnish with a balsamic reduction and fresh micro greens and dinner is done!

Are you looking for a new appetizer recipe? Who isn’t looking for a new appetizer recipe? If I could, I would live off appetizers. I actually ate this flatbread for dinner last night, breakfast today and then lunch today. So I guess you could say that I am in fact living off appetizers at the moment. Apps and chocolate chip cookies from one of my co-workers…

Caramelized onion and gorgonzola flatbread pizza garnished with fresh micro greens

Flatbreads are my fave because they’re basically just a fancy pizza. And pizza is life, right? Right.

Caramelized onion and gorgonzola flatbread pizza garnished with fresh micro greens

This recipe is actually a mash up of my favorite pizza crust recipe and my caramelized onion and blue cheese tart  from a while back. It’s like that palette pleasing pizza and that tasty tart had a flavorful flatbread baby. And baptized it with balsamic reduction and then garnished it with radish micro greens.

Caramelized onion and gorgonzola flatbread pizza garnished with fresh micro greens

Speaking of that reduction, guys, you might want to double the reduction portion of the recipe. Because you will want to put it on EVERYTHING. Like vanilla ice cream with strawberries. Or your avocado toast with a fried egg. Or any kind of salad in the world. If you’ve never had a balsamic reduction, reduce that balsamic vinegar and start livin’ girlfriend!

Caramelized onion and gorgonzola flatbread pizza garnished with fresh micro greens

If you like this flatbread recipe, make sure you check out my delicious and simple Loaded Baked Potato Flatbread!


Caramelized Onion & Gorgonzola Flatbread with Balsamic Reduction

  • Author: Midwest Foodie
  • Prep Time: 1 hour 10 mins
  • Cook Time: 20 mins
  • Total Time: 1 hour 30 minutes
  • Yield: 8 servings
  • Category: Pizza
  • Method: Baking
  • Cuisine: American


It’s like a palette pleasing pizza and a tasty tart had a flavorful flatbread baby. And baptized it with balsamic reduction and garnished it with greens.



  • 1 packet yeast (2 1/4 teaspoons)
  • 3/4 cup lukewarm water
  • 2 cups all purpose flour + more for flouring work surface
  • 1/2 tsp Kosher salt
  • 1 tablespoon olive oil + more for oiling dough

Caramelized Onions

  • 4 yellow onions, halved and thinly sliced
  • 2 teaspoons butter
  • 4 teaspoons olive oil
  • Large pinch Kosher salt
  • 1 teaspoon sugar
  • fresh cracked black pepper

Balsamic Reduction:

  • 1 cup balsamic vinegar

Flatbread Toppings:

  • 8 oz. fresh mozzarella, sliced
  • 3/4 cup crumbled Gorgonzola cheese
  • 1/2 cup micro greens



  1. Add yeast to a large bowl. Pour water over yeast and set aside for 5 minutes. Then use a fork to stir in flour, salt and oil. Once the dough starts to pull away from the sides of the bowl and come together, turn it out onto a lightly floured surface. Knead dough for 5 minutes. Coat ball of dough with olive oil, place in the large bowl, cover with saran wrap or a clean kitchen towel. Let rise for 1 hour in the warmest part of your kitchen.

Caramelized Onions:

  1. Heat butter and oil in a large saute pan over medium heat. Add onions and and stir to coat in oil. Grab a glass of wine and a magazine and plop yourself in front of the stove because you are going to be here for a while. You will cook the onions for 60 minutes total, stirring every 4-5 minutes or so. After they’ve cooked for 10 minutes add a pinch of salt. After they’ve cooked for 40 minutes add a teaspoon of sugar. After they’ve finished cooking for 60 minutes and are a gorgeous dark brown color, add salt and pepper to taste, then set aside.

Balsamic Reduction:

  1. Add balsamic vinegar to a small saucepan over high heat. Bring to a boil, turn heat down and simmer for 10-12 minutes or until the balsamic has reduced and will coat the back of a spoon. The consistency should be similar to syrup.

Assemble and Bake:

  1. Preheat oven to 450 degrees. Divide your dough ball in half and lightly flour your work surface. Roll each half into a rectangle about 8×12 inches. Transfer to a parchment lined baking sheet and poke surface of the dough all over with a fork. Bake for 5 minutes, then remove from oven and gather your ingredients.
  2. Layer onions, mozzarella and Gorgonzola, dividing everything evenly between the two flatbreads. Bake for 10-12 minutes or until the edges are golden brown and the cheese is melted.
  3. Drizzle flatbread with balsamic reduction, garnish with micro greens and enjoy!

Keywords: flatbread, caramelized onion, gorgonzola, family dinner, weeknight meals, bread, easy, simple, quick, recipe

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Caramelized Onion & Gorgonzola Flatbread | Midwest Foodie

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  1. Looks delicious. Reminds me of an appetizer that we had at this fancy restaurant once that I fell in love with. By the way your pictures look amazing as well

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