Equipment and preparation: For this recipe you will need a 15cm/6in, 23cm/9in and 30cm/12in round cake tin, thin cake boards of respective sizes, and 20cm/8in, 28cm/11in, 35cm/14in thick cake boards.

Preheat the oven to 375°. Line a 9-by-13-inch baking pan with parchment paper and coat lightly with nonstick vegetable oil spray. In a medium bowl, stir the pastry flour with the bread flour and ...