These vegan ladyfingers are light, crispy, and deliciously sweet! Perfect whether you're craving a delicious cookie or whipping up a batch of tiramisu.
Preheat the oven to 350°F and line a couple of baking sheets with parchment paper.
Whisk the flour, cornstarch, baking powder and salt together in a medium bowl.
In a large mixing bowl, beat ½ cup of sugar together with the butter, 1 tablespoon of aquafaba, and the vanilla extract using an electric mixer at high-speed. Beat the mixture until it becomes creamy, about 1 minute.
Place the remaining ½ cup of aquafaba into a separate large mixing bowl. Beat the aquafaba with an electric mixer at high-speed (Note 2) until soft peaks form. This can take up to 15 minutes, so be patient (Note 3).
Begin to slowly add the remaining half cup of sugar to the aquafaba mixture, about 2 tablespoons at a time, beating in each addition before adding more.
Using a rubber spatula, fold the butter mixture into the aquafaba mixture.
Now use a rubber spatula to fold the flour mixture into the aquafaba mixture.
Use a pastry bag to pipe the batter in 3 to 4 inch lines on the prepared baking sheets (Note 4).
Bake the ladyfingers until they feel set and are lightly browned around the edges.
Place the baking sheets on cooling racks and let the cookies cool for a few minutes before transferring them directly to the baking sheets to finish cooling.
Optionally, sprinkle the cookies with powdered sugar once they're cool.