170 degrees on ordinary electric oven - what do I reduce it to for my fan oven?

[PuffTheMagicDragon]

I'm doing a cake, and I can't remember what you reduce it to and it doesn't say on the recipe.

160?

I normally knock off 10

I usually knock off 20 but have no proof as to why this is right, so please don't take my word for it. I'd feel really guilty if you got food poisoning.

Thanks, I've gone for 10, and keeping an eye on it!

I usually kmock off 10

Also reduce cooking time as the fan cooks more efficiently.

Do you like my apron ?

Very fetching.

I usually reduce by 10 degrees and shorten the cooking time by 5 minutes.

I cook everything at 160 "until it's done".