Mary Berry smiling
Mary Berry's Clever Trick To Stop Wire Rack Marks On A Sponge Cake
In her cookbook "Mary Berry's Quick Cooking," Mary Berry suggests reducing the risk of wire rack marks on a sponge cake by placing the cake bottom-side down while baking.
The marked sides can be turned inward during decorating, so any uneven indentations or discolorations will be concealed and can be covered by fillings and frostings.
Alternatively, Berry suggests using a kitchen towel to create a protective layer between the fragile sponge and any offending hot wires in your oven.
As with all cakes, having a smooth, even surface to work with can lend to a more aesthetically pleasing finish, so heeding Berry's advice will have significant payoffs.