01 -
Position a rack in the center of the oven. Preheat the oven to 350℉ (180℃). Line two baking sheets with parchment paper. Fit a large pastry bag with a plain ½-inch round tube.
02 -
Place 4 egg whites in a large bowl and beat on high speed with an electric mixer until soft peaks start to form. Sprinkle in 2 tablespoons of granulated sugar and continue beating until stiff and glossy.
03 -
In a second bowl, beat egg yolks, vanilla extract, and the remaining granulated sugar with an electric mixer on medium-high speed until thick and pale, about 2 minutes.
04 -
With a rubber spatula, fold half of the beaten egg whites into the egg yolk mixture. Sift in the flour, cornstarch, and baking powder, then fold to combine. Gently fold in the remaining egg whites until fully incorporated.
05 -
Transfer the mixture to the prepared pastry bag. Pipe 3-inch-long fingers, about 1 inch wide and spaced 2 inches apart, onto the prepared baking sheets. Dust the tops with powdered sugar.
06 -
Bake in the preheated oven until firm to the touch and lightly golden brown, about 12–15 minutes. Let cool completely on the baking sheets, then transfer to a wire cooling rack. Repeat with the remaining batter.