Position a rack in the center of the oven and preheat the oven to 400ºF.
Grease a mini muffin pan with cooking spray.
Mix together the panko, parmesan cheese, and melted butter.
Place roughly 2 teaspoons of the panko mixture in the bottom of each muffin cup, using fingers or measuring spoon to tightly pack.
In a bowl, combine crab meat, cream cheese, mayonnaise, egg, sour cream, garlic powder, paprika, Old Bay, lemon zest and juice, chives, salt, and pepper.
Spoon roughly 1 tablespoon of the crab mixture into each muffin cup.
Bake for 14–18 minutes, until edges are golden. Let cool in pan for a few minutes.
Carefully remove bites with offset spatula or pairing knife. Serve warm or at room temperature, topped with extra chives and optional sauce.
Notes
OPTIONAL SAUCE: Mix ½ cup mayo, 1 tablespoon chopped chives, 2 teaspoons lemon juice, 1–2 teaspoons Cajun seasoning, and 1–2 teaspoons horseradish.