yes
Heavens no! Unless you like to eat charcoal.
No, the cooking time remains the same.
No, cooking time is only affect by how big or small your baking pan is. If it is larger, use the same cooking time to accommodate the larger portion.
Yes. Baked potatoes are usually cooked at 400o C for 1 hour while most cakes bake at 350o C. You will simply need to adjust your baking time for the potato, adding approx. 20 min. Alternately you can increase the baking temp when the cake is removed and adjust your time by about only 10 min.
They used cast iron cooking pots and pans. Cast iron cooking stuff has been around for a very long time
Yes. This allows one to cook/bake/make two different things at once. Instead of waiting to make one thing at a time, the dual wall oven can increase cooking time greatly. However, responsibility increases, too, since the cooking times may not be the same.
If porcupine meatballs are the same as most other meatballs, i.e. cooked in the oven in balls the same size, then no thereis no need to double the cooking time.
Unless you are using a microwave oven, the cooking time is the same regardless of the number of cookies baked at one time.
Absolutely. Depending on the recipe, there may be other small adjustments (like cooking time), but for the most part, just double it all.
Two whole turkeys would require more cooking time. The heat energy in the oven would be absorbed more to the point that the turkeys wouldn't be cooked fully at the end of the time. The best result would be to double the time on the oven, while checking periodically with a food thermometer to see when they are ready.
Yes, the time that cookies take to bake does affect the time that you should bake them for.
No, although you do need to make the oven hotter acording to the sixe of the piece of chicken. Reminds me of the Blonde who wanted to double her recipe for Chocolate Chip cookies but decided she could not do it. She realized her oven would not go to 800 degrees.