Preheat the oven to 400 F.
Line a baking sheet with aluminum foil, and lightly spray with nonstick spray.
In a small pan over a medium-low heat, combine the butter, olive oil, garlic, onion powder, dried basil, dried parsley, paprika, cayenne and salt and pepper to taste.
Stir the mixture until the butter has melted and everything is well-combined, then remove from the heat and add the lemon juice.
Make 4-5 diagonal slits into the salmon fillet on the skin side.
Place the salmon and the seasoning mixture into a large plastic bag, and allow to marinate at room temperature for about 15 minutes.
Transfer the salmon and the seasoning mixture to the prepared baking sheet, and bake 10-15 minutes, or until crisp around the edges and perfectly flaky in the center.
Allow to cool at least 2 minutes before serving.