Ingredients

• 4 cups confectioners’ sugar, plus more if needed
• 1 cup milk
• 1 + 1/2 cups all-purpose flour
• 1 + 1/2 cups sugar
• 1/2 cup unsweetened cocoa*
• 1/2 cup shortening or butter, softened
• 1/2 cup sour cream (regular or light, not non-fat)
• 2 eggs
• 4 tablespoons butter, at room temperature
• 1 teaspoon salt
• 1 teaspoon vanilla extract
• 1 + 1/4 teaspoons baking soda