Preheat the oven to 350°F. Spray two 8-inch cake pans with baking nonstick spray. Line the bottoms with 8-inch parchment paper circles and spray again.
In a medium bowl, sift the flour, cocoa powder, baking powder, baking soda, salt, and sugar together. Set aside.
2 ½ cups All-purpose flour, 1 cup Unsweetened cocoa powder, 1 ¾ cups White granulated sugar, 2 ½ teaspoon Baking powder, 1 ½ teaspoon Baking soda, 1 teaspoon Salt
Heat the water in a saucepan until steaming. In a large bowl, mix the oil, vanilla, eggs, and buttermilk. Slowly add in the hot water and mix until just combined.
¾ cup Oil, 1 teaspoon Pure vanilla extract, 4 Large eggs, 1 cup Buttermilk, 1 cup Hot water
Pour the dry ingredients into the wet and mix until just combined. This will be a runny batter. Pour the cake batter evenly into the 2 cake pans.
Bake for 25-29 minutes until a toothpick inserted comes out clean.
Let the cakes sit in the hot pans for 10 minutes before flipping onto a cooling rack. Cool cakes completely before decorating.