German Chocolate Cake Using Mix

• 9 layer pans
• 4 eggs
• 3 greased
• 3 eggs yolks
• 2 1/2 spread between layers of cake
• 1 frosting filling
• 1/2 sour cream
• 350 gr pecans (chopped)
• 300 ml buttermilk
• 240 ml evaporated milk