INGREDIENTS
!For the cookies:
1 cup
unsalted butter
3/4 cup
vegetable oil
1 1/4 cups
granulated sugar
3/4 cup
powdered sugar
2 tbsp
water
2
large eggs
1 tsp
vanilla
4 1/2 cups
all-purpose flour
1 cup
unsweetened cocoa powder (I use Dutch process)
1 tsp
salt
1/2 tsp
baking soda
1/2 tsp
cream of tartar
!For the frosting:
1/4 cup
unsalted butter
6 tbsp
sour cream
1/2 tsp
vanilla
3 1/2 cups
powdered sugar
1/2 cup
unsweetened cocoa powder (I us Dutch process)
2 tbsp
milk