01 -
Preheat your oven to 225°F (110°C) and line a baking sheet with parchment paper.
02 -
In a clean bowl, beat the egg whites until foamy. Add a pinch of salt and continue beating until soft peaks form.
03 -
Gradually add the granulated sugar, one tablespoon at a time, while continuing to beat until stiff peaks form and the mixture is glossy.
04 -
Gently fold in the cornstarch and vinegar, ensuring they are well incorporated.
05 -
Carefully fold in the lemon zest and juice. Avoid deflating the meringue.
06 -
Using a piping bag fitted with a star tip, pipe small mounds of meringue onto the prepared baking sheet, spacing them a few inches apart.
07 -
Place the baking sheet in the preheated oven and bake for about 1 hour. The cookies should be dry to the touch and can easily lift off the parchment paper.
08 -
Turn off the oven and leave the cookies inside to cool gradually to room temperature for at least 30 minutes.
09 -
If desired, sprinkle powdered sugar on top for additional sweetness and presentation.