INGREDIENTS
1 cup
or 226g) unsalted butter, softened
1/4 cup
granulated sugar
3/4 cup
confectioners sugar
3
eggs, room temperature
3/4 cup
vegetable oil
1 tsp
cream of tartar
1 tsp
salt
5 1/2 cups
all-purpose flour
1/2 cup
unsalted butter, softened
3/4 cup
sour cream
4 cups
-5 cups (440-550g confectioners sugar)
1 tsp
salt
red food color