Caramelized Onion Mushroom Flatbread

Featured in: Fresh & Light Meals

This savory flatbread brings together the sweetness of caramelized onions and the earthiness of sautéed mushrooms atop a golden crust. Layers of mozzarella and tangy goat cheese melt to create a rich texture complemented by fresh herbs. The dough, rolled out and baked until crispy, provides a perfect base for this balanced combination of flavors. Ideal as a light meal or appetizer, this dish showcases a harmonious blend of textures and tastes, ready in under an hour.

Updated on Sun, 16 Nov 2025 16:43:00 GMT
Warm Caramelized Onion & Mushroom Flatbread, topped with melted cheese, ready to eat. Save
Warm Caramelized Onion & Mushroom Flatbread, topped with melted cheese, ready to eat. | tastyeffect.com

A savory flatbread topped with sweet caramelized onions, earthy mushrooms, melty cheese, and fresh herbs—perfect as an appetizer or light meal.

I first made this flatbread for a family movie night, and it quickly became everyone's top request for gatherings or quick weeknight dinners. The combination of caramelized onions and mushrooms never fails to impress.

Ingredients

  • Dough: 1 pound (450 g) store-bought or homemade pizza dough
  • Olive oil: 2 tablespoons
  • Yellow onions: 2 large, thinly sliced
  • Balsamic vinegar: 2 teaspoons
  • Mushrooms: 8 ounces (225 g) cremini or button, sliced
  • Garlic: 2 cloves, minced
  • Fresh thyme: 1 teaspoon leaves (or 1/2 teaspoon dried)
  • Salt: 1/2 teaspoon
  • Black pepper: 1/4 teaspoon
  • Mozzarella cheese: 1 cup (100 g), shredded
  • Goat cheese or feta: 1/2 cup (50 g), crumbled
  • Fresh parsley (optional): 2 tablespoons, chopped

Instructions

Preheat Oven:
Preheat the oven to 450°F (230°C). If using a pizza stone, place it in the oven to heat.
Caramelize Onions:
In a large skillet over medium heat, add 1 tablespoon olive oil and the onions. Cook, stirring occasionally, until onions are golden and caramelized, about 20 minutes. Stir in balsamic vinegar and cook 2 more minutes. Remove onions from skillet and set aside.
Sauté Mushrooms:
In the same skillet, add remaining 1 tablespoon olive oil. Add mushrooms and cook until softened and golden, about 6–8 minutes. Add garlic, thyme, salt, and pepper; cook for 1 minute. Remove from heat.
Prepare Dough:
On a lightly floured surface, roll out the dough into a 12x8-inch (30x20 cm) rectangle or oval. Transfer to a parchment-lined baking sheet or preheated pizza stone.
Assemble Flatbread:
Evenly spread the caramelized onions over the dough. Top with mushrooms, then sprinkle with mozzarella and goat cheese (or feta).
Bake:
Bake for 12–15 minutes, until the crust is golden and the cheese is bubbly and lightly browned.
Finish & Serve:
Remove from oven, sprinkle with fresh parsley if desired, slice, and serve warm.
Golden-brown Caramelized Onion & Mushroom Flatbread, perfect for sharing as a delicious appetizer. Save
Golden-brown Caramelized Onion & Mushroom Flatbread, perfect for sharing as a delicious appetizer. | tastyeffect.com

This flatbread is a frequent addition to our weekend dinners, enjoyed by kids and adults alike, especially when paired with a simple salad and good conversation.

Recipe Variations

Experiment by adding baby arugula after baking or finishing with a drizzle of truffle oil for extra elegance and flavor depth.

Serving Suggestions

Serve as an appetizer sliced into small pieces, or make it a main with a bowl of soup or fresh salad. It pairs beautifully with a crisp white wine.

Allergen & Nutrition Info

This flatbread contains wheat and dairy. For gluten-free, use a gluten-free pizza crust; for dairy-free, use vegan cheese. Each serving has 365 calories, 15g fat, 46g carbs, and 13g protein.

Perfectly baked, cheesy Caramelized Onion & Mushroom Flatbread, sizzling from the oven with fresh herbs. Save
Perfectly baked, cheesy Caramelized Onion & Mushroom Flatbread, sizzling from the oven with fresh herbs. | tastyeffect.com

This flatbread looks stunning on any table and vanishes quickly. Enjoy every bite while it’s warm and melty!

Recipe FAQ

How do I caramelize onions properly?

Cook thinly sliced onions slowly over medium heat with oil until they turn golden brown and sweet, stirring occasionally to prevent burning. This process typically takes about 20 minutes.

Can I use a different type of cheese?

Yes, mozzarella and goat cheese provide a nice melt and tang, but you can substitute with feta, fontina, or a cheese blend that melts well and complements onions and mushrooms.

What dough options work best for this flatbread?

Store-bought or homemade pizza dough both work well. For a quicker option, naan or pre-baked flatbread can be used as a base.

How can I make this dish vegan or gluten-free?

Use gluten-free dough alternatives and swap cheeses for plant-based vegan options to accommodate dietary restrictions.

What's the best way to reheat leftover flatbread?

Reheat in a preheated oven or toaster oven at moderate heat to maintain crispness, avoiding microwaves which can make the crust soggy.

Can additional herbs or toppings be added?

Fresh herbs like parsley or thyme enhance flavor; optional toppings such as arugula or a drizzle of truffle oil add depth and freshness.

Caramelized Onion Mushroom Flatbread

Savory flatbread topped with caramelized onions, mushrooms, melty cheese, and fresh herbs, ideal for an appetizer or light meal.

Prep duration
20 min
Cook duration
35 min
Complete duration
55 min
Created by Jane Miller


Skill level Medium

Heritage Contemporary American

Output 4 Portions

Dietary requirements Meat-free

Components

Dough

01 1 pound store-bought or homemade pizza dough

Toppings

01 2 tablespoons olive oil
02 2 large yellow onions, thinly sliced
03 2 teaspoons balsamic vinegar
04 8 ounces cremini or button mushrooms, sliced
05 2 cloves garlic, minced
06 1 teaspoon fresh thyme leaves or ½ teaspoon dried thyme
07 ½ teaspoon salt
08 ¼ teaspoon black pepper
09 1 cup shredded mozzarella cheese
10 ½ cup crumbled goat cheese or feta
11 2 tablespoons chopped fresh parsley (optional)

Directions

Phase 01

Preheat oven: Preheat oven to 450°F. Place pizza stone inside if using.

Phase 02

Caramelize onions: Heat 1 tablespoon olive oil in a large skillet over medium heat. Cook onions, stirring occasionally, until golden and caramelized, about 20 minutes. Stir in balsamic vinegar and cook 2 minutes more. Remove onions and set aside.

Phase 03

Cook mushrooms: Add remaining tablespoon olive oil to the skillet. Sauté mushrooms until softened and golden, about 6 to 8 minutes. Add garlic, thyme, salt, and pepper; cook 1 minute. Remove from heat.

Phase 04

Prepare dough: On a lightly floured surface, roll dough into a 12 by 8 inch rectangle or oval. Transfer to parchment-lined baking sheet or preheated pizza stone.

Phase 05

Assemble toppings: Evenly spread caramelized onions over the dough. Top with mushrooms, then sprinkle mozzarella and goat cheese evenly.

Phase 06

Bake flatbread: Bake for 12 to 15 minutes until crust is golden and cheese is bubbly and lightly browned.

Phase 07

Garnish and serve: Remove from oven, sprinkle with fresh parsley if desired, slice, and serve warm.

Necessary tools

  • Large skillet
  • Rolling pin
  • Baking sheet or pizza stone
  • Knife and cutting board

Allergy details

Review each component for potential allergens and seek professional healthcare advice if uncertain.
  • Contains wheat (gluten) and dairy (cheese). Use gluten-free crust and vegan cheese alternatives for allergies.

Nutritional information (per portion)

These values are approximate guides only and shouldn't replace professional medical consultation.
  • Energy: 365
  • Fats: 15 g
  • Carbohydrates: 46 g
  • Proteins: 13 g