01 -
Cream together the softened butter and icing sugar until smooth. Add the egg white and mix until well incorporated. Fold in the flour until you achieve a smooth paste. Divide into small bowls and color with pink and purple gel food coloring as desired. Transfer the colored pastes to piping bags fitted with fine nozzles. Pipe decorative designs (hearts, stars, bows) onto a baking paper-lined Swiss roll tray. Freeze the design for 15-20 minutes until firm.
02 -
Preheat oven to 180°C (350°F). In a large bowl, whisk eggs, sugar, and vanilla extract until light, fluffy, and tripled in volume, approximately 8 minutes using an electric mixer. Gently fold in the sifted flour and salt, taking care not to deflate the airy mixture.
03 -
Pour the batter evenly over the frozen design in the prepared tray. Carefully smooth the top. Bake for 10-12 minutes until golden and the cake springs back when lightly touched. Immediately remove from oven and invert onto a clean sheet of baking paper. Gently peel off the original baking sheet to reveal the decorative design.
04 -
While still warm, roll the cake gently with the new baking paper inside. Allow to cool completely in this rolled position to set the shape.
05 -
Once completely cool, carefully unroll the cake. Spread a generous layer of strawberry jam over the entire surface. If desired, add a thin layer of whipped cream or mascarpone. Roll the cake back up tightly, keeping the pattern on the outside. Chill for at least 30 minutes before slicing to serve.