Stan,
if you use cast iron to bake a cake I would bake at 325 F instead of 350 F as cast iron retains heat just like glass does, also, since its dark it attracts heat too. For a pie its great, because you want lots of heat right away to bake the bottom crust quickly so it doesn't get soggy. Baking is science, just like cooking is and its important to understand what the effects of different baking pans have on the finished product.
BTW, anyone that has problems with cookies getting too brown or burnt on the bottom, be sure you are using SHINY baking sheets! Never use those Baker's Secret cookie sheets if you want cookies that aren't burnt. Remember, dark attracts heat and if the cookie sheet is dark your cookies will burn. This means you also have to pay attention to washing both the top and the BOTTOM of the cookie sheets. If there is any residual grease on the bottom of the cookie sheet, the next time you put that bad boy in the oven, guess what, that grease will turn dark brown on the bottom and your cookies won't come out the way you want them to. Also, rotate the cookie sheets half way through the baking time, move the bottom sheet to the top rack and turn it from front to back, likewise with the lower sheet. Your cookies will come out beautifully.
Now I'll apologize for digressing LOL. And, Han's please forgive me for going off topic, I didn't mean to hijack your thread!
Eddie