Using ingredient whites chocolate mixture to lighten

Andrea's Fudge Cake

• 9 springform (pan)
• 6 eggs
• 1/4 whites chocolate mixture to lighten (into)
• 400 gr sugar
• 350 gr semi-sweet chocolate
• 230 gr butter
• 200 gr all-purpose flour -confectioners sugar for -garn -sh
• 26 gr espresso