Le Dolci Rainbow Cake

Ingredients

• 188 g Oil
• 375 g Sugar
• 4 PC Eggs
• 338 g Flour
• 12 g Baking Powder
• 5 g Salt
• 150 g Milk
• 1/2 Tbsp Vanilla
• 2 cups or 400g of granulated sugar
• 4 Egg whites or 1/2 cup or 120g of Egg whites
• 2 pounds or 4 cups or 908g of Butter (soft and unsalted)
• 2 teaspoons of vanilla
• Pinch of salt
• 900g butter (room temperature)
• 480g icing sugar (sifted)
• upto 250g whole milk(room temperature)