Hey friend, preheat your oven to 400°F (200°C) and line a large baking sheet with parchment or foil – easy cleanup ahead!

Gently wipe your portobellos clean with a damp paper towel (don’t soak them). Pop out the stems and, using a spoon, carefully scrape out the dark gills – this is your canvas for pizza goodness!

Brush both sides of each mushroom cap generously with olive oil, then sprinkle the insides with salt and pepper. Place them gill-side up on your baking sheet.

Slide them into the oven for 8–10 minutes to pre-roast. This step is clutch – it releases extra moisture so your stuffing doesn’t get watery.

When they come out, carefully blot any liquid that pooled inside with a paper towel. Your mushrooms are now perfectly tender and ready to party!

Spoon about 1–1½ tablespoons of marinara into each cap – don’t be shy, spread it edge to edge like pizza sauce.

Pile on the cheese: sprinkle a generous layer of mozzarella first, then nestle those cute pepperoni pieces all over. Finish with a snow-cap of Parmesan – because more cheese is always the answer.

Sprinkle Italian seasoning, garlic powder, and a pinch of red pepper flakes (if you like a little kick) over the tops.

Bake for 12–15 minutes until the cheese is melted, bubbly, and just starting to turn golden. Switch to broil for the last 1–2 minutes for that pizzeria-style blistered top (watch closely!).

Let them rest 5 minutes (this helps everything set), garnish with fresh basil ribbons, and serve with extra warm marinara for dipping. Prepare for applause!