Cotton Sponge Cake

𝙄𝙣𝙜𝙧𝙚𝙙𝙞𝙚𝙣𝙩𝙨;

• 60g butter, melted

• 80g flour, sifted

• 80ml full cream milk

• 1 whole egg

• 5 egg yolks

• 5 egg whites

• 120g caster sugar