INGREDIENTS
1 cup
softened butter
1 1/2 cups
granulated sugar
3/4 cup
vegetable oil
1/4 cup
sour cream
2
egg yolks
1 tsp
vanilla extract
3 cups
all-purpose flour
3/4 cup
unsweetened cocoa powder
1 tsp
baking powder
1/2 tsp
salt
1/2 cup
softened butter
1 tsp
vanilla extract
1/2 tsp
salt
1 cup
powdered sugar
1 tbsp
milk
food coloring, (optional)