Preheat your oven to 350°F. Grease and flour three 8-inch cake pans.
In a bowl or stand mixer, blend butter, granulated sugar, brown sugar, and vegetable oil. Add vanilla and eggs, beating until fully combined.
Mix in flour, cocoa powder, baking soda, baking powder, salt, and buttermilk. Slowly add hot coffee and mix until incorporated.
Pour the batter into the prepared pans and bake for 30 minutes or until done. Let the cakes cool for 15 minutes before transferring to a cookie sheet. Allow them to cool completely before frosting.