Preheat your oven to 375°F (190°C) to ensure even baking and golden color.
Clean mushroom caps gently with a damp paper towel. Remove stems from large caps or scoop out centers of smaller mushrooms to create space for filling.
In a mixing bowl, combine softened cream cheese, crab meat, chopped parsley, chopped green onions, grated Parmesan cheese, and Stone House Seasoning. Mix until creamy and well incorporated.
Using a spoon or spatula, generously fill each mushroom cap with the crab mixture, packing it in to fill each bite with flavor.
Sprinkle panko breadcrumbs over the stuffed mushrooms for added crunch and texture.
Place stuffed mushrooms on a baking sheet and bake for 20-25 minutes until tender and golden brown on top.
Remove from oven, let cool slightly, and serve warm, optionally garnished with extra chopped parsley.