This Portobello Mushroom Mini Pizza recipe features tender mushroom caps topped with homemade pizza sauce, pepperoni, sausage and gooey mozzarella! It's a healthy and delicious alternative to traditional pizza.

Jump to:

• ❤️ Why You'll Love This Portobello Mushroom Pizza
• 🛒 Ingredients Portobello Mushroom Pizza
• 🔪 How to Make Portobello Mushroom Keto Pizza
• ☑️ Storage Instructions
• 💡 Tips for Keeping Portobello Mushrooms Fresh
• 🍴 What to Serve with Portobello Pizza
• 🔄 Substitutions and Additions
• Are Mushrooms Keto?
• What Are the Carbs in Portobello?
• Can I Make These Pizzas in Advance?
• Why Are My Baked Mushrooms So Watery?
• 🍽️ More Keto Pizza Recipes

❤️ Why You'll Love This Portobello Mushroom Pizza

• Tender and hearty jumbo portobello mushroom caps
• Topped with pepperoni, Italian sausage and mozzarella cheese
• Great low carb alternative to traditional pizza
• Easy to make
• Uses all healthy ingredients

Have you ever been in the mood for a really good low carb pizza, but just didn’t have the time to make a fathead or other Keto-friendly pizza crust? Portobello mushrooms take the place of the crust in these tasty little pizzas! These mini pizzas are a quick and delicious alternative, offering all the flavors of your favorite pizza without the carbs.

The combination of savory marinara sauce, melted mozzarella cheese, and flavorful toppings like sausage and pepperoni creates a mouthwatering dish that's perfect for lunch or dinner. The rich, meaty texture of the portobello mushrooms paired with the classic pizza toppings will be a go-to recipe for any pizza lover.

If you're looking for another awesome pizza recipe, check out this Pizza Bowl.

🛒 Ingredients Portobello Mushroom Pizza

• Portobello mushrooms
• Mozzarella cheese
• Low Carb Marinara Sauce
• Italian sausage
• Pepperoni slices
• Dried oregano

*Exact measurements are listed in the recipe card below.

🥣 Recommended Tools

• Baking sheet
• Parchment paper

🔪 How to Make Portobello Mushroom Keto Pizza

Preheat your oven to 400°F.

You'll want to clean mushrooms by brushing over them gently with a slightly damp paper towel, remove the stems and scrape out the gills. 

Place the mushroom caps top side down on a baking sheet lined with parchment paper.  Brush the tops with olive oil, then bake for 5 minutes.

Increase the temp of your oven to 425°F, then flip the mushroom caps over and soak up any liquid with paper towels. Add some marinara sauce in each cap.

Add the ground Italian sausage and mozzarella cheese.

Lastly, add the pepperoni slices and dried oregano.

Place them back in the oven for an additional 10 minutes, or until cheese is melted and golden.  If the cheese isn’t melted enough, bake for another 2 minutes on the top rack of your oven.

Allow to cool slightly before serving. Garnish with a little sweet basil and enjoy!

☑️ Storage Instructions

Cool Completely: Allow the pizzas to cool completely at room temperature.

Refrigerate: Place the cooled pizzas in an airtight container or wrap them tightly in plastic wrap. Store in the refrigerator for up to 3 days.

Reheat: To reheat, preheat your oven to 350°F and bake for about 10-15 minutes or until heated through. You can also reheat them in the microwave for 1-2 minutes, but the oven will help maintain the texture better.

💡 Tips for Keeping Portobello Mushrooms Fresh

• As soon as you get your Portobello mushrooms home, take them out of the plastic container and put them in a paper bag or you can lay them out flat on paper towels. Moisture is not a mushroom's friend so this will allow them to dry out some.

• Once you've dried them out, put the bag or paper towels in the fridge. They'll keep longer if they are stored chilled.

• Don't store mushrooms in any type air tight bag or container because condensation will build up and they will go bad quickly.

• Don't clean them until right before you're ready to use them. Using a slightly damp paper towel, gently clean each mushroom. A lot of opinions are you should never wash mushrooms. The reason why is because mushrooms act like sponges and will soak up the water, rendering soggy and mushy cooked mushrooms. However, if you have stubborn debris, you can quickly run that spot under the water.

• Before using them, look for any that have become slimy and discard them. Sometimes if they've been in the container that's been wrapped in plastic at the store, the ones on the bottom will start to go bad sooner.

🍴 What to Serve with Portobello Pizza

These mini pizzas are a complete meal all in one, but you can always serve a low carb veggie side. Here are some great ideas:

• Mixed Green Salad: A fresh, crisp salad with a light Lemon Vinaigrette adds a nice contrast to the savory pizzas.

• Fresh Vegetables: Roasted vegetables like Air Fryer Broccoli, Cheddar Roasted Cauliflower, or Grilled Zucchini complement the flavors of the pizzas and add more nutritional value.

• Caesar Salad: The creamy Caesar Dressing and crunchy croutons of a Caesar salad make a perfect pizza side dish.

• Caprese Salad: Caprese Salad made with fresh mozzarella, tomatoes, and basil drizzled with balsamic glaze add a refreshing and flavorful side.

🔄 Substitutions and Additions

There's honestly an endless amount of possibilities of toppings for this gluten free pizza. Choose your favorite and go for it. Here are some of the more popular toppings to give you inspiration:

• Turn these Keto pizzas into a BBQ pork pizza with leftover shredded Instant Pot Baby Back Ribs and Homemade Keto BBQ Sauce instead of the marinara.
• You can also use shredded chicken with Low Carb Alfredo as the sauce. Top with cheddar instead of mozzarella for a really different spin.
• Olives, sautéed bell peppers and feta cheese gives this gluten free pizza a Mediterranean spin.
• For a classic that kids adore, make this a cheeseburger pizza by adding hamburger meat and cheddar to the caps, bake until the cheese is melted then drizzle with Homemade Sugar Free Thousand Island Dressing.

Are Mushrooms Keto?

Yes indeed! They are low carb and full of nutrients. They are a good source of protein, fiber, vitamin C, folate, iron, zinc as well as a great source of vitamin B6, vitamin D, thiamin, riboflavin, potassium, copper, and selenium.

What Are the Carbs in Portobello?

There're approximately 3.5 grams of carbs per serving! They're so hearty and filling and they are perfect for a meat replacement!

Can I Make These Pizzas in Advance?

Yes, you can prepare the mushroom caps and toppings ahead of time. Assemble the pizzas and store them in the refrigerator. When ready to serve, bake as directed.

Why Are My Baked Mushrooms So Watery?

Portobello mushrooms naturally release water when cooked. Make sure to pre-bake the mushroom caps and soak up any excess liquid with paper towels before adding the toppings.

🍽️ More Keto Pizza Recipes

• Pizza Stuffed Peppers
• Sausage and Pepperoni Pizza Pie
• Pepperoni Pizza with Fathead Dough
• Pepperoni Pizza Bagels
• Cauliflower Pizza Crust

*Originally published on April 27, 2018, updated on August 6, 2024 with improvemets to the recipe, new photos, new recipe information and helpful tips.