Step 1

Preheat the oven to 375 degrees F. Coat a sheet pan with cooking spray.

Step 2

Arrange the mushroom caps on the sheet pan.

Step 3

Heat 1 tablespoon of butter in a pan over medium heat. Add the onion and cook for 3-4 minutes or until translucent. Add the garlic and cook for 30 seconds more.

Step 4

Place the onion mixture in a large bowl along with the crab, cream cheese, shredded cheese, parmesan and 2 tablespoons of chives. Stir to combine.

Step 5

Place a dollop of the crab filling into each of the mushrooms.

Step 6

Melt the remaining 2 tablespoons of butter in the microwave. Stir in the panko crumbs until they're coated in butter.

Step 7

Sprinkle the panko mixture over the tops of the mushrooms.

Step 8

Bake for 20 minutes or until golden brown. Sprinkle with remaining tablespoon of chives, then serve.