My Mom is making a cake. Its an old recipe, 50 - 70 yrs old (or older). All it says is to use a warm oven. No temperature range, just a warm oven. What temperature would this be?
Without any details on the recipe, it is hard to offer any firm recommendations. That said, I have had success using a convection oven on 180 degrees Celsius (356 degrees Fahrenheit), and checking for doneness with a bamboo skewer.
For some cakes, I bake longer at 300F, and the result is quite delicate.