-
Preheat oven to 375 degrees F. Grease 15x10 sheet pan.
-
In one bowl, combine flour, baking soda, and baking powder. Set aside.
-
In a large bowl, beat eggs, 1/2 cup sugar, and the vanilla.
-
In a third bowl, beat egg whites until soft peaks before to form. Slowly add in the remaining sugar and beat until stiff white peaks form.
-
Add flour to the second bowl, then fold in the egg whites.
-
Evenly spread onto greased sheet pan. Bake for 10-12 minutes.
-
Cool for 5 minutes.
-
Lay out a kitchen towel and dust with powdered sugar. Gently slide a butter knife along cake pan and lay cake flat onto towel. From one end roll up into towel completely. Place on wire rack until completely cool.