Fudge Cake With Milk Chocolate Frosting

• 3 eggs
• 1 fudge cake
• 450 ml milk chocolate
• 450 gr brown sugar (light)
• 375 gr cake flour
• 350 ml milk
• 325 gr butter softened
• 250 gr semisweet
• 160 gr butter softened
• 130 gr unsweetened chocolate