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Vegan Mushroom and Caramelized Onion Flatbread

A savory, elegant flatbread featuring a simple homemade yeast dough, topped with sweet, slow-caramelized yellow onions, earthy cremini mushrooms, fresh thyme, and a sweet-tart balsamic glaze. Naturally dairy-free and deeply flavorful.

Vegan Mushroom and Caramelized Onion Flatbread
Prep 20 min Cook 40 min Total 2h Level Intermediate
Serves 4

Ingredients

Flatbread Dough

  • 0.75 cup Warm water — 110°F (45°C)
  • 2.25 teaspoons Active dry yeast — 1 standard packet
  • 1 teaspoon Sugar or maple syrup — To feed the yeast
  • 2 cups All-purpose flour — Plus extra for dusting
  • 1 teaspoon Salt
  • 2 tablespoons Extra virgin olive oil

Toppings

  • 2 large Yellow onions — Thinly sliced
  • 3 tablespoons Extra virgin olive oil — Divided use
  • 8 ounces Cremini mushrooms — Cleaned and sliced
  • 2 cloves Garlic — Minced
  • 1 tablespoon Fresh thyme — Leaves only, plus extra for garnish
  • 0.5 teaspoon Salt — To taste
  • 0.25 teaspoon Black pepper — Freshly ground
  • 2 tablespoons Balsamic glaze — For drizzling

Instructions

  1. In a small bowl, combine the warm water, yeast, and sugar. Stir gently and let sit for 5-10 minutes until foamy.

    ~10 min
    If the mixture doesn't foam, your yeast may be dead. Start over with fresh yeast.
  2. In a large bowl, whisk together the flour and salt. Add the yeast mixture and 2 tablespoons of olive oil. Stir until a shaggy dough forms. Knead on a lightly floured surface for 5 minutes until smooth. Place in a lightly oiled bowl, cover with a damp towel, and let rise in a warm place for 1 hour or until doubled in size.

    ~65 min
    You can also use a stand mixer with a dough hook for the kneading process.
  3. While the dough rises, heat 2 tablespoons of olive oil in a large skillet over medium-low heat. Add the sliced onions and a pinch of salt. Cook slowly, stirring occasionally, until deeply golden brown and caramelized, about 30 minutes. Remove from the skillet and set aside.

    ~30 min
    If the onions start to dry out or catch on the bottom, add a splash of water to deglaze the pan.
  4. In the same skillet, add the remaining 1 tablespoon of olive oil over medium-high heat. Add the mushrooms in an even layer. Let them cook undisturbed for 3-4 minutes to brown, then stir. Add the minced garlic, fresh thyme, salt, and pepper. Cook for another 2-3 minutes until mushrooms are tender. Remove from heat.

    ~8 min
    Do not salt the mushrooms too early, or they will release their water and steam instead of brown.
  5. Preheat your oven to 450°F (230°C). If using a pizza stone, place it in the oven to preheat.

    ~15 min
  6. Punch down the dough and divide it into two equal pieces. Roll or stretch each piece into an oval or rectangle shape, about 1/4 inch thick. Place the dough onto parchment paper or a lightly dusted pizza peel.

    ~5 min
  7. Brush the dough lightly with a little olive oil. Spread the caramelized onions evenly over the bases, then top with the sautéed mushroom mixture.

    ~2 min
  8. Bake the flatbreads for 10-12 minutes, or until the crust is golden brown and crispy.

    ~12 min
    Bake one at a time if your oven/stone cannot accommodate both.
  9. Remove from the oven. Drizzle generously with balsamic glaze and sprinkle with extra fresh thyme leaves. Slice and serve hot.

    ~2 min
Nutrition
420
Calories
10
Protein (g)
62
Carbs (g)
14
Fat (g)
2
Sat. Fat (g)
5
Fiber (g)
9
Sugar (g)
680
Sodium (mg)
0
Cholesterol (mg)
Equipment
  • Mixing bowls
  • Large skillet
  • Baking sheet or pizza stone
  • Rolling pin
  • Measuring cups and spoons
  • Chef's knife
  • Cutting board
Tips & Storage
  • For a shortcut, you can use store-bought pizza dough.
  • Balsamic reduction can be made by simmering standard balsamic vinegar until it thickens.
  • Add a pinch of red pepper flakes to the mushrooms if you like a little heat.
  • Storage: Store leftover flatbread in an airtight container in the refrigerator for up to 3 days. Reheat in a 350°F oven or toaster oven for 5-7 minutes to restore crispness.
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🤖 This recipe was created with AI assistance. If you spot a mistake or something that doesn't look right, please report it.