INGREDIENTS
1
box yellow/white cake mix
1 cup
all-purpose flour
1 cup
granulated sugar
1/2 tsp
salt
3
large eggs
1 1/3 cups
water
2 tbsp
vegetable oil
1 cup
sour cream (250g carton)
2 tsp
vanilla extract
9 cups
powdered sugar (sifted)
3 cups
unsalted butter (room temperature)
1 tbsp
vanilla extract (or flavoring of your choice)
4 tbsp
heavy whipping cream
Blue color gel