Gather and prep all ingredients. Season cod with salt and pepper to taste.

In a small bowl or mortar and pestle, crush the walnuts and set aside.

Mix together the parmesan cheese and parsley, then press cod into mixture to coat as well as you can.

Add half of the butter into a pan over medium heat. Once bubbling, add in the cod fillets and cook until browned on both sides, about 2 minutes per side. Once done, remove from pan and set aside.

In the same pan, add the rest of the butter and turn heat to medium-high. Add in the zoodles and season with garlic powder, onion powder, and salt and pepper to taste.

Cook zoodles until tender, about 2-4 minutes. About 1-2 minutes before they are ready, add in the crushed walnuts and allow to toast in the butter as zoodles cook.

Serve zoodles with the cod. Drizzle any remaining butter from the pan over the fish and zoodles. Enjoy!