Heat oven to 400°F.
Line a 10x15-inch jelly roll pan with parchment paper.
Set aside.
Place thighs in a pie plate.
Place panko in a separate pie plate.
Use an immersion blender to puree ¼ cup honey, butter, garlic, salt, and pepper.
Pour over thighs, turning to evenly coat.
Roll each in panko.
Place 1-inch apart, skin side up, in the center of the parchment-lined pan.
Sprinkle with remaining panko.
Then sprinkle evenly with parsley flakes.
Holding can about 6 inches away, spray tops with cooking spray until panko is lightly coated.
Bake for 20 minutes.