Homemade Mushroom Pizza on Flatbread

Love homemade flatbread pizza? This wild mushroom pizza is a fantastic mushroom and onion recipe. Enjoy this caramelized onion pizza today!

How about a delicious, cheesy pizza that’s also loaded with nutrient-rich veggies? This homemade flatbread pizza is super easy to make, so get ready for a slice or two–or three!–of this caramelized onion pizza.

Plus, the cook time on this pizza is only about 15 minutes. That’s not too bad at all.

How to Make Homemade Flatbread Pizza 

Mushrooms are one of my favorite foods ever. If I could eat only five foods for the next month, mushrooms would be one of them. In fact, I love them so much that I once visited Italy during mushroom season so I could get my fill of fresh ones! 

So it felt pretty right to combine my loves of mushroom and pizza–all things Italian, right?!–to make the ultimate tasty wild mushroom pizza. This one is pretty easy to make, since you don’t even need pizza sauce or fresh basil.

I ended up creating a fairly low-calorie pizza loaded with veggies. For the crust of this flatbread pizza, I used a flatbread pizza crust that’s also fairly low in calories.

This Wild Mushroom Pizza is So Easy to Make

How to make this homemade pizza? The first step is prepping the sauteed mushrooms and onions. To do this, I started preparing the toppings by sautéing mushrooms in low-sodium vegetable broth in a large skillet over medium heat. You can also cook the mushrooms in a nonstick pan.

The key is to stir the mushrooms and cook until the liquid begins to thicken. Then you continue to cook, stirring, until it becomes pretty thick and that’s when you take the veggies off the burner. This adds additional flavor for very few calories.

Then I caramelized onions and garlic. Many people think you need lots of oil and sugar to accomplish this, but you actually don’t need either! It helps to slice the onions into thin slices. If you don’t have white or yellow onions, on hand, you can use red onions.

I next cooked up some kale for a touch of green, as well as extra nutrition and filling fiber. I love a cheesy pizza, so I topped the crusts with a part-skim mozzarella, goat cheese, and Parmesan. I added the cooked onions and mushrooms, plus a sprinkle of red pepper flakes for a hint of spice.

Then my pizzas were ready to pop into the oven on a baking sheet! As for nutritional information? You end up with pizzas that are high in protein, offering 11 grams–22%of the daily value–per serving to help keep you fuller for longer. Plus, who can say no to a golden brown crust?

This recipe makes four servings, so it’s great for family pizza night. Or if you’re like me, you can make it for lunch and store the leftovers in the fridge. I suggest serving a couple of slices with a side salad or some steamed or sautéed veggies to add even more greens to your meal.

If you’re wanting a side dish to go along with this homemade flatbread pizza, opt for a side salad portion of a chopped salad or a Mediterranean vegetable salad.

This homemade vegetarian Cheesy Wild Mushroom & Caramelized Onion Pizza close up on a platter

More Healthy Pizza Recipes

If you love vegetarian pizza, also try these healthy pizza recipes:

Ready to whip up a delicious, veggie-packed pizza?

This blog post was updated in December 2020. The content was originally part of a partnership with Flatout.

mushroom pizza on flatbread

Cheesy Wild Mushroom & Caramelized Onion Pizza

How about a delicious, cheesy pizza that’s also loaded with nutrient-rich veggies?
Prep Time 5 mins
Cook Time 18 mins
Total Time 23 mins
Course Appetizer, Snack
Cuisine American
Servings 4
Calories 210 kcal


  • cups wild mushrooms sliced
  • Low-sodium vegetable broth, as needed
  • 1 yellow onion, diced
  • 2 cloves garlic, minced
  • cups kale, massaged and torn
  • Cooking spray
  • 2 Flatout Rustic White Artisan Thin Pizza Crusts
  • 3 ounces part-skim mozzarella, diced into small chunks
  • 1 ounce soft goat cheese, crumbled
  • 2 tbsp shredded Parmesan
  • ¼ tsp red pepper flakes
  • 2 tsp extra-virgin olive oil


  • Preheat oven to 375° F.
  • Place mushrooms in a small non-stick pan and add vegetable broth until just covered. Cook over medium-high heat until most of liquid is absorbed, about 3-4 minutes.
  • Add kale to pan, along with a small amount of broth. Cook until most of liquid is absorbed and kale is tender, about 4 minutes, stirring occasionally.
  • Meanwhile, place onions and garlic in a small non-stick pan; add vegetable broth until just covered. Cook over medium-high heat until translucent, about 5-7 minutes. Continue to cook once liquid is absorbed; stir frequently as onions and garlic begin to brown. Place cooked vegetables aside.
  • Next, treat a large non-stick cookie sheet with spray oil.
  • Cook pizza crusts for 2 minutes. Remove, and top with mozzarella, onions, garlic, mushrooms, kale, goat cheese, Parmesan, and red pepper flakes.
  • Drizzle with olive oil, and cook until cheese is melted, 5-7 minutes.
  • Slice, and serve immediately.


Weight Watchers ® SmartPoints ® value per serving: 5. 


Calories: 210kcalCarbohydrates: 18gProtein: 11gFat: 10gSaturated Fat: 4gCholesterol: 18mgSodium: 370mgFiber: 2gSugar: 4g
Keyword Flatbread, Mushrooms, Pizza
Did you make this recipe?Mention @amydgorin and tag #plantbasedwithamy
Want an easy party appetizer? Try this healthy flatbread pizza recipe. This homemade vegetarian Cheesy Wild Mushroom & Caramelized Onion Pizza is full of veggies and sure to delight! #plantbased #appetizerrecipes #vegetarian #partyfood #healthyrecipes

I’d love to hear from you! What are your favorite toppings for a healthier pizza? What other flat bread recipes do you enjoy?

Appetizer | Dinner | Fast / Easy | Low Carb | Lunch | No Added Sugar | Nut Free | Oven / Toaster | Pescatarian | Recipes (Organizational) | Vegetarian |

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