I am making the cakse bases tonight for my birthday lunch on sunday but the cake is two tier......My dilemma is that the batter is made as one big batch and then it tells you to pour it into a 20cm and 24cm cake tins but doesnt tell me how much for each cake tin.....I dont want one being higher then the other.....

Can anyone tell me how I can measure it out so they arent completely two different heights cause of the two different size tins??