Prepare the Mushrooms: Clean the mushroom caps with a damp paper towel. Remove and finely chop the stems for later use.
Cook the Filling: In a mixing bowl, combine cream cheese, crumbled bacon, Parmesan cheese, minced garlic, chopped mushroom stems, paprika, salt, and pepper. Mix until smooth and well-combined.
Fill the Mushrooms: Lightly brush the mushroom caps with olive oil. Spoon the filling into each cap, slightly mounding the top.
Bake: Arrange the mushrooms on a greased baking sheet. Bake at 375°F (190°C) for 20-25 minutes, or until the filling is golden and bubbly.
Garnish and Serve: Remove from the oven and let cool slightly. Garnish with fresh parsley or chives and serve warm.