Preheat the oven to 425℉. Line a small, rimmed baking sheet with foil.
In a small bowl, combine the brown sugar, paprika, garlic powder, cayenne, salt and black pepper. In a separate bowl, combine the panko with parsley, butter and a sprinkle of Kosher salt and freshly ground black pepper.
Place the salmon skin-side-down on the prepared baking sheet. Spread Dijon on the surface of the salmon fillets. Divide the sugar mixture among the fillets and spread on the top. Then spread the tops of the salmon with the breadcrumb mixture. Gather the foil up around the sides of the salmon (so the sugary juices don’t spread while baking and burn).
Bake for about 12 minutes, until the salmon is tender (will depend on the thickness of your salmon).