01 -
Heat the oven to 400°F (204°C).
02 -
In a medium bowl, combine melted butter, minced garlic, garlic powder, onion powder, lemon zest, lemon juice, and red pepper flakes.
03 -
Add cod fillets to the bowl and gently toss to coat evenly with the lemon butter mixture.
04 -
Place cod fillets in a 9x13-inch baking dish, pour remaining sauce over them, and arrange lemon slices on and around the fillets.
05 -
Bake in the preheated oven for 10 to 15 minutes, until the fish is opaque and flakes easily with a fork.
06 -
Sprinkle chopped fresh parsley over the baked cod and serve immediately.