INGREDIENTS
1 cup
butter, softened
3/4 cup
vegetable oil
1 3/4 cups
sugar, divided
3/4 cup
powdered sugar
2 tbsp
water
2
eggs
5 1/2 cups
flour
1/2 tsp
baking soda
3/4 tsp
cream of tartar
1 tsp
salt
1/2 cup
butter, softened
1/2 cup
sour cream OR plain greek yogurt
2 tbsp
cream cheese, softened
1 tsp
salt
1/2 tsp
vanilla
7 cups
powdered sugar
1/4 cup
milk