Foolproof Sponge Cake
SERVES16 to 20 (Makes two 8- or 9-inch cakes)
WHY THIS RECIPE WORKS
We wanted a sponge cake recipe that gave us a fairly light cake, one with a springy but delicate texture that could stand up nicely to custard fillings. After fine-tuning a "classic" hot milk sponge cake recipe—adding butter for f...