Portobello Pizza

This Portobello Pizza recipe has everything you love about pizza-melty mozzarella, zesty sauce, and crispy-edged pepperoni-served in tender, meaty mushroom caps. It's an easy, satisfying way to enjoy pizza night without making dough.

The secret is roasting the mushrooms before adding the toppings, then draining them. This simple step removes excess moisture, so every bite is cheesy and flavorful instead of watery. We tested the pre-roast time, gills in or out, oven temperature, and how much sauce, cheese, and pepperoni each cap can hold.

My grandson loves helping us make portobello mushroom pizza! He starts by drawing and coloring a picture of exactly how he wants his pizza to look, then helps choose and prepare the toppings. He watches us assemble his creation and loves seeing the cheese melt in the oven. The adults handle the hot oven and pizzas, but he gets to enjoy seeing his masterpiece come to life!

Why You Will Love This Recipe

• No Dough Needed: Portobello caps are the crust, so these pizzas are low in carbs and need no rolling or rising.
• Never Soggy: Pre-roasting the caps gill-side up and draining them removes the moisture that makes mushroom pizzas watery.
• Quick and Customizable: They take about 30 minutes, and you can change the toppings to suit your family.
• Oven or Air Fryer: Use whichever appliance you prefer, with tested times for both.

Why Portobello Pizza Gets Soggy and How to Fix It

Mushrooms are mostly water, and they release it as they cook. If that liquid ends up under the sauce and cheese, the pizza turns watery. Pre-roasting and draining is the most important step. Here is what goes wrong and how to fix it, based on our tests.

How We Tested Portobello Pizza

We tested the mushroom preparation, the oil and seasoning, the toppings, the oven temperature, and the storage. These are the results.

Pre-roast time at 425°F:

Oven temperature and final bake:

• Gills: Removing them is better. They hold moisture and can make the pizza wetter and slightly bitter. Leaving them in gave more liquid and a darker, earthier taste.
• Gill-Side Up or Down: Gill-side up was better. The liquid pools in the cup so you can drain it, while gill-side down let the liquid soak into the pan and steamed the mushrooms.
• Draining: Blotting or pouring off the liquid after pre-roasting was the most important step. Skipping it is the main reason these turn soggy.
• Oil: Two tablespoons for four caps coated them lightly without greasiness. One tablespoon left them a bit dry.
• Salt and Seasoning: ¼ teaspoon of salt was safer because pepperoni and cheese are already salty, and 1 teaspoon of Italian seasoning was enough. Two teaspoons tasted strong and slightly bitter.
• Sauce, Cheese, and Pepperoni: About 4-5 teaspoons of sauce per cap was ideal, ¼ cup of low-moisture shredded mozzarella was the sweet spot, and 8-12 mini pepperoni covered each cap without making it greasy.
• Leftovers: Day 1 was still good, day 2 was acceptable, and by day 3 the mushrooms were noticeably wetter. The air fryer was the best way to reheat.

Ingredients

These portobello pizzas use a short list of simple ingredients. The amounts per cap matter, because too much sauce or cheese makes the center wet.

• Portobello Mushroom Caps: Choose 4 large, firm caps, 4-5 inches wide. Wipe them with a damp paper towel instead of rinsing, because mushrooms absorb water.
• Olive Oil, Salt, and Pepper: 2 tablespoons of oil, ¼ teaspoon of salt, and ¼ teaspoon of pepper season all four caps.
• Pizza Sauce: Use thick pizza sauce, about 4-5 teaspoons per cap.
• Mozzarella: Low-moisture shredded mozzarella melts cleanly. Use about ¼ cup per cap.
• Mini Pepperoni: About 8-12 pieces per cap.
• Italian Seasoning: 1 teaspoon is enough for four caps.
• Optional Toppings: Finely diced red onion, sliced olives, and fresh basil.

Find the exact measurements in the recipe card below.

Variations

• Vegetarian: Skip the pepperoni and add finely diced red onion, olives, and bell pepper.
• Supreme: Add finely diced green pepper, onion, and olives along with the pepperoni.
• Margherita-Style: Skip the pepperoni and top with mozzarella, patted-dry sliced tomato, and fresh basil.
• Spicy Pepperoni: Use spicy mini pepperoni or add a pinch of red pepper flakes.
• Keep Toppings Small: Dice vegetables finely and use only a few toppings so the caps do not overload.

How to Make Portobello Pizza

These four steps give you tender, cheesy portobello mushroom pizzas without the sogginess. Pre-roasting the caps before adding the toppings is the key to the best texture.

Step 1: Prepare the Mushrooms. Preheat the oven to 425°F. Line a rimmed baking sheet with parchment paper. Clean the mushroom caps, remove the stems, and scrape out the gills. Brush with olive oil, season with salt and pepper, and roast gill-side up for 10 minutes. Drain or blot away any released liquid.

Step 2: Add the Sauce and Seasonings. Spread about 1 tablespoon plus 1 teaspoon pizza sauce inside each mushroom cap. Sprinkle evenly with Italian seasoning.

Step 3: Add the Toppings. Top each mushroom with ¼ cup shredded mozzarella, 8-12 mini pepperoni, and any optional pizza toppings.

Step 4: Bake and Serve. Return the mushrooms to the oven and bake for about 9 minutes, until tender and the cheese is melted and bubbly. Broil for 1 minute if desired, watching closely. Garnish with fresh basil and serve warm.

Air Fryer Portobello Pizza

You can make portobello pizzas in the air fryer too. Pre-roast the caps gill-side up at 375°F for 6-8 minutes, then pour off or blot the liquid and add the toppings. Air fry for 5-7 minutes more, until the cheese melts. For extra color, broil or air fry for the last minute. Work in batches if the caps do not fit in a single layer.

If you love recipes like this, you may also enjoy our easy zucchini pizza boats and frozen pizza burgers.

Storage Directions

Refrigerator: Store cooked pizzas in an airtight container for up to 3 days, though they are best in the first day or two.

Reheating: The air fryer is best because it crisps the edges and melts the cheese. The oven is good and more even. The microwave is fastest but gives the softest, wettest result.

Freezing: Freezing assembled pizzas makes the mushrooms noticeably watery and soft after thawing. For the best texture, freeze the pre-roasted, drained caps plain and add the toppings after thawing, or make them fresh.

Make Ahead: Pre-roast and drain the caps up to 24 hours ahead and store them separately. Add the toppings and bake when you are ready.

Serving Suggestions

• Serve portobello pizzas with a crisp green salad, or with skillet roasted broccoli for an easy low-carb dinner.
• For a heartier meal, add garlic bread or garlic cheese breadsticks. They also work as a snack or an appetizer.

More Easy Pizza Recipes

Craving more pizza flavor? Try our hot honey pepperoni pizza, Texas toast pizza, Big Mac pizza, or pizza pinwheels.

For more handheld pizza fun, make our pizza sliders or air fryer pizza grilled cheese.

If you try this recipe and love it please leave a star rating in the recipe card below or even better, drop a review in the comment section. I always appreciate your feedback. Be sure to follow along with me on Facebook, Pinterest, and YouTube for more easy recipes!