- 1 cup (226g) unsalted butter, softened
- ¾ cup (150g) granulated sugar
- 1 large egg
- 1 teaspoon vanilla extract
- 2 ¼ cups (280g) all-purpose flour
- ½ teaspoon baking powder
- ¼ teaspoon salt
For the Lemon Filling:
- ½ cup (120ml) fresh lemon juice (about 2-3 lemons)
- 1 tablespoon lemon zest
- ½ cup (100g) granulated sugar
- 2 large egg yolks
- 2 tablespoons cornstarch
- ½ cup (120ml) water
- 2 tablespoons unsalted butter
For Garnishing (Optional):
- Powdered sugar
- Whipped cream
- Lemon zest curls