INGREDIENTS
1 1/2 cups
all-purpose flour
1 cup
granulated sugar
1 tsp
baking soda
1 tsp
salt
1/3 cup
unsweetened cocoa powder
1/2 cup
vegetable or canola oil
1 cup
water
1 tsp
vanilla extract
1 tbsp
apple cider vinegar
1/4 cup
unsalted butter
4 tbsp
unsweetened cocoa powder
3 tbsp
sour cream or Greek yogurt
1 1/2 cups
confectioners' sugar
1/2 tsp
vanilla extract