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Caramelized Onion Pesto Flatbread Pizza
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3.87 from 22 votes

Caramelized Onion Pesto Flatbread

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 Time5 minutes
Cook Time25 minutes
Total Time30 minutes
Course: Main Course
Cuisine: American
Servings: 8 servings
Calories: 146kcal
Author: Dorothy Kern
Cost: 6


  • 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


  • 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.



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