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Pesto Flatbread Pizza Recipe with caramelized onions – this EASY 4 ingredient pizza recipe is the perfect appetizer. Pesto, caramelized onions, and mozzarella baked onto a pizza crust – every time I make this people rave about it!

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Caramelized Onion Pesto Flatbread - this EASY 4 ingredient pizza recipe is the perfect appetizer. Pesto, caramelized onions, and mozzarella baked onto a pizza crust - every time I make this people rave about it!

Best Flatbread Pizza Recipe

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Caramelized onion pesto flatbread is one of those easy appetizer recipes that I make for every party. Every single one! It’s always the first thing to disappear and people always rave about how amazing it is. I say thank you while they ooooh and aaaaah and pretend I slaved over a hot stove all day, when in fact it, takes less than 30 minutes to make this recipe.

Flatbread Pizza is so easy to make when you start with a prepared pizza crust and then top it with pesto and onions!

Caramelized Onion Pesto Flatbread Pizza - this EASY 4 ingredient pizza recipe is the perfect appetizer. Pesto, caramelized onions, and mozzarella baked onto a pizza crust - every time I make this people rave about it!

Ingredients in Easy Flatbread Pizza

  • Pizza Crust – I love taking semi-homemade help from the store and using Pillsbury pizza crust but this would also work with my homemade pizza crust recipe.
  • Pesto – While pizza sauce is great, homemade pesto is even better!
  • Onions – I cook these in some olive oil to get them all nice and caramelized for the top.
  • Mozzarella Cheese – shred your own cheese for best melting!

How to caramelize onions:

The onions are the most labor intensive thing to make for this recipe and even they’re easy! Usually I’ll make a big batch to use over a few days. I simply cook my onions over medium heat in some oil with a sprinkling of sugar until they’re browned and caramelized. I don’t love onions but I love them when they’re caramelized!!

flatbread with onions and pesto on top laid out on a cutting board

How to make a flatbread pizza

  • Spread your dough out onto a cookie sheet brushed with olive oil.
  • Top with pesto, cheese, and onions.
  • Bake then eat!

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Variations

  • By default this is vegetarian flatbread pizza, but you could add sausage or pepperoni. Use your favorite toppings!
  • Add some of your favorite vegetables, like roasted red peppers or artichokes.
  • Top flatbread with goat cheese, parmesan cheese or crumble some feta on top instead, or even use fresh mozzarella.
flatbread with onions and pesto on top laid out on a cutting board

FAQs

Is flatbread dough the same as pizza dough?

I think of flatbread dough as a thinner crust pizza. Some restaurants make it crunchy and think like a cracker, but my recipe uses pizza crust.

What’s the secret to good pizza?

Cook the pizza at a high temperature to get a crisp bottom.

How to reheat leftover pizza?

The best way to reheat leftover pizza is in the air fryer or a frying pan to crisp up the bottom!

3.92 from 23 votes

Caramelized Onion Pesto Flatbread

By: Dorothy Kern
Caramelized Onion Pesto Flatbread – this EASY 4 ingredient pizza recipe is the perfect appetizer. Pesto, caramelized onions, and mozzarella baked onto a pizza crust – every time I make this people rave about it!
Prep Time: 5 minutes
Cook Time: 25 minutes
Total Time: 30 minutes
Servings: 8 servings
Caramelized Onion Pesto Flatbread Pizza
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Ingredients

  • 1 tablespoon olive oil
  • 1 medium onion, sliced
  • 1 teaspoon granulated sugar
  • 1 prepared pizza crust, (from scratch or from the refrigerated section, like Pillsbury)
  • ½ cup pesto
  • 1 ½ cups shredded mozzarella cheese

Instructions 

  • Heat a 10-12” skillet over medium heat and add the oil. Swirl around the pan, then add the sliced onions. Sprinkle the onions with the sugar and toss to coat. Cover and cook 5-10 minutes over medium low, stirring often, until they start to brown, then remove the cover and continue cooking an additional 3-7 minutes, stirring often, until the onions are soft and caramel in color. Remove from pan and set aside to cool.
  • Preheat oven to 450°F. Line a cookie sheet with parchment paper. Unroll pizza crust. You can also use a prepared pizza crust (homemade or store-bought), one that makes one 12” pizza, but make it into a rectangle or an oblong rectangle.
  • Spread the pesto over the top of the pizza crust. Sprinkle with cheese and spread the cooled caramelized onions over the top.
  • Bake for 8-10 minutes, or until the bottom and edges are browned and the cheese is melted and bubbly. Slice and serve warm.

Nutrition

Serving: 1serving | Calories: 146kcal | Carbohydrates: 3g | Protein: 5g | Fat: 12g | Saturated Fat: 4g | Cholesterol: 17mg | Sodium: 277mg | Potassium: 36mg | Sugar: 1g | Vitamin A: 455IU | Vitamin C: 1mg | Calcium: 134mg | Iron: 0.2mg

Nutrition information is automatically calculated, so should only be used as an approximation.

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Other Favorite Pizza Recipes

Our favorite Flatbread pizza recipe – pesto pizza with caramelized onions! This is a great appetizer or main course – easy to make with semi-homemade pizza dough.

Dorothy Kern

Welcome to Crazy for Crust, where I share recipes that are sometimes crazy, often with a crust, and always served with a slice of life.

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3.92 from 23 votes (21 ratings without comment)

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19 Comments

  1. I feel like anythings with pesto or caramelized onions is going to be tasty. So this recipe with both will probably be really amazing. I will get my boyfriend to buy these ingredients and we’re definitely going to try it out. Thank you.

    Joan Michel
    http://www.swaagcaat.com

    Reply

  2. This is perfect for parties and I can see why it would disappear! Just the other day I sent a message on FB messenger to the wrong person..thankfully it was nothing juicy. But it made me look like a moron no doubt 🙂

    Reply

  4. I sent a text to the wrong person last week and was completely mortified. I’m embarrassed again just thinking about it! I would pay and the for an app with instant recall!

    On a more positive note, this flatbread looks amazing!

    Reply