Whisk the eggs lightly in a mixing bowl. Add the sugar, stirring well until smooth and creamy. Mix 40 gr of flour with the cocoa powder. Gradually stir the flour mixture into the egg mixture. Add 1 tbsp of melted butter, stirring well until well combine.
Grease an 18cm round cake tin and pour the batter into the tin. Bake for about 20 minutes at 190ºC preheated oven until firm to the touch. Leave to cool in the tin.
Put the milk in a saucepan together with the cornstarch and 50 grams of sugar and bring to the boil for 2 minutes. Remove from the heat and put the mint leaves and leave it for 2-3 minutes. Drain well, removing all the leaves. Add the mint syrup and chill.
Melt 50 grams of sugar in 1 tablespoon of water in a saucepan. Cool. In a separate bowl, whisk the egg white with half tablespoon of sifted sugar to soft peaks. Add the melted sugar and continue beating until stiff.
Then gently fold the egg white into cold mint mixture, mixing well. Fold the whipping cream into the mixture and chill for about 30 minutes in the freezer.
Pour and spread the mint batter over the top of the cake and let it chill in the freezer for about 4 hours. Decorate with grated and chocolate flakes before serving.
