(Haddock is very similar to Cod in taste & texture, but the filets are thinner & a bit more delicate.) I preheated the oven to 400 degrees & placed the filet - skin-side down - in an olive-oiled baking dish & topped it with several heaping tablespoons of a delicious jarred olive tapenade. Baked for 25 minutes (since a thick layer of topping tends to insulate the fish a bit from the heat).
http://www.discusscooking.com/forums/f16/how-long-to-bake-cod-fish-fillets-53774.html
Put all of the foil packets containing the cod onto a cookie sheet. Lay the foil packets side by side, not stacking any of them, to ensure that all the fish gets properly cooked. Put the cookie sheet containing the cod packets into an oven that has been preheated to 400 degrees. Bake for 20 minutes. 10. Remove the cod packets from the oven and check each foil packet to ensure the fish has been properly cooked.
http://www.wikihow.com/Bake-Codfish
1 Lightly oil the grates.  Season both sides of cod with Cajun seasoning, lemon pepper, salt, and black pepper. Set fish aside on a plate. Heat butter in a small saucepan over medium heat, stir in lemon juice and green onion, and cook until onion is softened, about 3 minutes.
http://allrecipes.com/recipe/222202/grilled-cod/
1 Allow fire to spread to all coals, about 10 minutes, before spreading briquettes out into the grill; let coals burn until a thin layer of white ash covers the coals. Lightly oil the grates.  Season both sides of cod with Cajun seasoning, lemon pepper, salt, and black pepper. Set fish aside on a plate.
http://allrecipes.com/recipe/222202/grilled-cod/
Put all of the foil packets containing the cod onto a cookie sheet. Lay the foil packets side by side, not stacking any of them, to ensure that all the fish gets properly cooked. 9. Put the cookie sheet containing the cod packets into an oven that has been preheated to 400 degrees. Bake for 20 minutes.
http://www.wikihow.com/Bake-Codfish
1 Bake cod in the preheated oven for 10 minutes. Remove from oven; top with lemon juice, wine, and cracker mixture. Place back in oven and bake until fish is opaque and flakes easily with a fork, about 10 more minutes.  Garnish baked cod with parsley and green onion. Serve with lemon wedges.
http://allrecipes.com/recipe/228319/perfect-ten-baked-cod/
Sometimes I do a sort of piperade mixture of stewed tomatoes, onions, & cooked bell peppers; other times a sort of Greek treatment with diced or sliced tomatoes, sliced red onions, fresh chopped oregano, & feta cheese; still other times I make a light cream sauce with fresh tarragon - the sky's the limit!
http://www.discusscooking.com/forums/f16/how-long-to-bake-cod-fish-fillets-53774.html
1 Place remaining 2 tablespoons butter in a 7x11-inch baking dish. Melt in the preheated oven, 1 to 3 minutes. Remove dish from oven. 2  Coat both sides of cod in melted butter in the baking dish.  Bake cod in the preheated oven for 10 minutes. Remove from oven; top with lemon juice, wine, and cracker mixture.
http://allrecipes.com/recipe/228319/perfect-ten-baked-cod/
1 Coat both sides of cod in melted butter in the baking dish.  Bake cod in the preheated oven for 10 minutes. Remove from oven; top with lemon juice, wine, and cracker mixture. Place back in oven and bake until fish is opaque and flakes easily with a fork, about 10 more minutes.
http://allrecipes.com/recipe/228319/perfect-ten-baked-cod/
1 Heat butter in a small saucepan over medium heat, stir in lemon juice and green onion, and cook until onion is softened, about 3 minutes.  Place cod onto oiled grates and grill until fish is browned and flakes easily, about 3 minutes per side; baste with butter mixture frequently while grilling.
http://allrecipes.com/recipe/222202/grilled-cod/
how long to bake cod
You should bake cod for 10 minutes.   It takes 10 minutes to bake Cod.