01 - Preheat oven to 400°F. Line a baking sheet with parchment paper or lightly grease it.
02 - Clean mushroom caps, gently remove stems, pat dry and set aside.
03 - In a medium bowl, combine cream cheese, mozzarella, cheddar, green onions, jalapeños, garlic, smoked paprika, black pepper, and salt. Mix until smooth and well combined.
04 - Spoon or pipe the cheese filling into each mushroom cap, slightly mounding the filling.
05 - In a small bowl, mix breadcrumbs with melted butter and parmesan. Sprinkle evenly over the filled mushrooms.
06 - Arrange stuffed mushrooms on the prepared baking sheet.
07 - Bake for 20-25 minutes, until mushrooms are tender and tops are golden brown.
08 - Remove from oven, garnish with fresh parsley and serve warm.