Preheat oven to 350°F. Line two 8-inch round cake pans with parchment paper and spray with baking spray.

In a large bowl, whisk together flour, cocoa powder, sugar, baking powder, baking soda, and salt.

Stir in vegetable oil until dry ingredients are well coated, followed by eggs and vanilla.

Stir in buttermilk until combined, then carefully pour in hot coffee and stir until smooth.

Add batter evenly to prepared cake pans and bake for 30-35 minutes, or until a toothpick comes out smooth or with moist crumbs.

Cool cake layers slightly in cake pans, then transfer to a wire rack to cool completely before adding frosting.