Rainbow Cake

Cake Layers

• 14 oz sugar
• 14 oz unsalted butter, room temperature, in pieces
• ½ tsp salt
• 1 tbsp vanilla extract
• 6 large eggs
• 14 oz cake flour
• 1 tbsp baking powder
• 3 tsp gel food colorings (½ tsp each purple, blue, green, yellow, orange and red dye)

Frosting

• 10 ½ oz white chocolate, in pieces
• 3 ½ oz unsalted butter, cut into pieces
• 24 oz cream cheese, cut into pieces
• 2 oz orange liqueur
  ou 2 oz orange juice
• 3 ½ oz confectioners sugar