Chocolate Layer Cake

Name: Chocolate Layer Cake
Prep time: 20 min
Cook time: 30 min
Total time: 2 h
Yield: 12
Ingredients: Ingredients; 1¾ cups all-purpose flour; 2 cups granulated sugar; ¾ cup unsweetened cocoa powder; 2 teaspoons baking soda; 1 teaspoon baking powder; 1 teaspoon salt; 2 large eggs, room temperature; 1 cup buttermilk, room temperature; 1 cup strong black coffee, cooled; ½ cup vegetable oil; 2 teaspoons vanilla extract; Chocolate Buttercream; 1 cup unsalted butter, softened; 3½ cups powdered sugar; ¾ cup unsweetened cocoa powder; ½ cup heavy cream; 2 teaspoons vanilla extract; ¼ teaspoon salt