recipe for cake in 8 inch tins, only have 9 inch, what to do?

[otchayaniye]

do i have to up the ingredients (currently a nigella choc fudge cake using 3 eggs) or just cook for less time?

I found this website that might help you work it out.

oh, you star, thanks. i've seen some conversion ones but that's easy peasy!

I was just coming to share that link with you

I'd just put it in and cook it for slightly shorter time - test to see it it's cooked by seeing if it is coming in at edges, or listening to it, or the spring back test, or using a skewer

It might come out too thin & biscuity that way, its probably better to increase the ingredients proportionately for better results.

If it's not too late, you probably need to increase all the ingredients by just under a third for each inch tin size you increase, and conversely decrease by 25% for each inch size decrease.

i'm going to up the ingredients, helpfully it works going 3-4 egss. my oven is bonkers so would probably make a biscuit. ta all