I'm planning on trying a Red Velvet Cake recipe I picked up, but my
>(fan forced) oven can only reach 250 degrees C, and the recipe I have
>states that the cake should be cooked at 350 degrees for about 30 >minutes.
Your oven will be fine. The recipe means 350 F.
A quick calculation from Deg F to Deg Celsius (C = (5/9)*(F-32) yields about 176C.
(350C is about 650F, and I've not seen a home oven that gets that hot, except maybe a self-clean cycle).)
jenn
-- Jenn Ridley snipped-for-privacy@chartermi.net