Preheat the oven to 350 degrees. Line the bottom of three 8inch cake pans with parchment paper, and spray with nonstick spray. Set them aside.
Add the flour, granulated sugar, cocoa powder, baking soda, baking powder and salt to a large mixing bowl and combine. 1 3/4 cup All Purpose Flour , 2 cups Granulated Sugar, 3/4 cup Unsweetened Cocoa Powder, 1 1/2 tsp Baking Soda, 1 tsp Baking Powder, 1 tsp Salt
In another bowl add the eggs, milk, oil, and vanilla extract and whisk them together. 2 Large Eggs, 1 cup Buttermilk , 1/2 cup Vegetable Oil, 2 tsp Vanilla Extract
Add the wet ingredients to the dry ingredients and mix together until well combined. Scrape down the sides as needed.
Slowly pour the hot water into the batter and mix on low speed until well combined. Continue to scrape down the sides and bottom of the bowl as needed to make sure everything is mixed well. The batter will be very thin. 1 cup Hot Water
Pour the batter into the prepared pans and place in the preheated oven. Bake for 25-30 minutes until a toothpick can be inserted and comes out with a few moist crumbs. (Don't check the cake until at least 25 minutes, opening the oven will cause it to fall)
Remove the cake from the oven and allow to cool completely.