2 x 8 inch-ish cake tins (square) - how much cake mix please?

[funnypeculiar]

for ds' birthday cake... each cake tin is 22.5 cm sq, and tin is 4 cm deep.
Was just planning chocolate sponge, unless anyone wants to be clever - but is so, it must be very 'mouldable', iykwim
TIA

6,6, 6 and 3

Flour, sugar, butter, eggs!

thank you

sorry, but oh cake queen, how long will it need to cook? (as obviously, will stop watching it and get distracted at the vital moment...)

I normally use a 4 egg mix with an 8 inch tin and a 3 egg mix with 7 iyswim (so like Mars said but 8 8 8 4)

Liking the 8,8,8 & 4 don't forget to add 2tsps of baking powder and about 4 tbsps of milk.

Shouldn't take more than 30 mins I think. Remember to press the top and if it springs back it's cooked.

thanking you...