For the Chocolate Cake

• 1¾ cups all-purpose flour
• ¾ cup unsweetened cocoa powder
• 1½ cups granulated sugar
• 1 teaspoon baking powder
• 1½ teaspoons baking soda
• ½ teaspoon salt
• 2 large eggs, room temperature
• ½ cup vegetable oil
• 1 cup milk or buttermilk
• 2 teaspoons vanilla extract
• 1 cup hot water or hot coffee

For the Chocolate Frosting

• 1 cup unsalted butter, softened
• 3½ cups powdered sugar
• ½ cup unsweetened cocoa powder
• ¼ cup heavy cream or milk
• 1 teaspoon vanilla extract
• Pinch of salt