How long to bake salmon in foil at 400 degrees F: A 4-ounce piece of salmon requires about 20 minutes to bake in foil at 400 degrees F. You know the fish is done when it flakes easily with a fork. Rack … Place the foil packets on a large rimmed baking sheet. How that happens is that, after seasoning your salmon, you seal it up in a foil pouch. The vegetables should be tender at this point, too! Put the salmon on the lined baking sheet and fold all the sides of the foil up. How long to bake salmon in foil at 400 degrees F: A 4-ounce piece of salmon requires about 20 minutes to bake in foil at 400 degrees F. You know the fish is done when it flakes easily with a fork. This is the easiest question to answer, as well as the most important aspect. Spread the butter mixture on salmon. Place the foil packets on a large rimmed baking sheet. When you heat it, which you do in a very hot oven, the fish cooks by way of the steam that's released from the salmon itself as well as any vegetables, citrus and fresh herbs you might (and should) add to the pouch. Use a foil to line the baking sheet. Fold the foil over the salmon and cover it well. How long and what temp to bake salmon in foil? When you heat it, which you do in a very hot oven, the fish cooks by way of the steam that's released from the salmon itself as well as any vegetables, citrus and fresh herbs you might (and should) add to the pouch. Cook in the oven for about 20 minutes. Alternatively, you … Keep the temp between 350-400F, as every oven heats a bit differently. Bake for 20 minutes or until the fish is cooked and pulls apart easily. Mix the sugar, butter, lemon juice, thyme, oregano, garlic, salt, rosemary, and pepper in a bowl. Cooking salmon in foil is a way of steaming it.How that happens is that, after seasoning your salmon, you seal it up in a foil pouch. Fold the sides of the foil into a tight packet around the fish and asparagus. I’ve chosen to do this Honey Baked Salmon in Foil at 400F. Cooking salmon in foil is a way of steaming it. The vegetables should be tender at this point, too!