Pre-heat the oven to 320F (160C) Grease and flour an 8 inch (20 cm) cake pan (springform if you have one).
In a medium bowl sift together the flour and corn starch. Set aside.
In a large bowl or stand up mixer add the eggs and sugar and beat for 15 minutes, add the vanilla and beat another 2 minutes.
Gently fold half the sifted flour into the beaten eggs and combine, then add the remaining flour and gently fold until smooth and completely combined. Pour into the prepared cake pan and bake for 30-35 minutes. Let cool in pan for 10 minutes then move to a wire rack to cool completely. Enjoy!