Preheat the oven to 350°F. Spray three 8-inch cake pans with baking nonstick spray. Line the bottoms with three 8-inch parchment paper circles and spray again.
Melt the chocolate in the microwave safe bowl. Melt in 20 second intervals. Then, let it cool before using.
4 oz Semi-sweet chocolate bar
In a medium bowl, sift the flour, cocoa powder, baking soda, baking powder, and salt. Then, add in the sugar.
2 ½ cups All-purpose flour, 1 cup Unsweetened cocoa powder, 1 ¾ cup White granulated sugar, 2 ½ teaspoon Baking powder, 1 ½ teaspoon Baking soda, 1 teaspoon Salt
In a large bowl, mix the oil, vanilla, eggs, buttermilk, and melted chocolate. Slowly mix in the hot water. Pour in the dry ingredients 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 cake batter into the 3 cake pans. Bake for 23-25 minutes until a toothpick inserted comes out clean.
Let the cakes sit in the hot pans for 10 minutes before transferring to a cooling rack. Cool the cake layers completely before using.