Preheat oven to 350 °F (180 °C).
Beat the eggs with the granulated sugar in a double boiler until a thick foam forms.
Remove from heat and beat again.
Mix together the flour and cornstarch and carefully fold into the beaten mixture.
Stir in the melted butter.
Line a cake ring with parchment paper and fill with batter.
Bake for about 45 minutes.
After baking, overturn onto parchment paper sprinkled with granulated sugar.
Carefully pull the parchment paper from the cake and remove from the cake ring.
Bake Time: about 45 minutes
