*Measure flour by spooning it into a dry-measure cup and then scraping off excess with a knife to level.
Kitchen Tip: Caster sugar can be made by processing granulated sugar in the food processor or blender and pulsing until it reaches a super-fine but not powdery consistency.
Make-Ahead Tip: To store, wrap cakes with plastic wrap in groups and store in an airtight container at room temperature. Cakes will remain fresh for a few days. Re-warm gently before serving, if desired, by wrapping in a paper towel and heating in the microwave very briefly.