Rolling Out the Dough
- Beat butter and powdered sugar: Start by creaming together the soft butter and powdered sugar in a mixing bowl until smooth.
- Incorporate egg yolk: Add the egg yolk to the butter-sugar mixture and mix until well combined.
- Add plain flour: Gradually add the sifted plain flour to the mixture, stirring until a smooth dough forms.
- Chill the dough: Transfer the dough onto baking paper, cover it with another sheet of baking paper, and roll it out into a sheet about 3-4 mm thick. Place it in the freezer for 15 minutes to firm up.
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