Preheat oven to 350°F (175°C). Grease and line two 8-inch round pans.
In a large bowl, sift together flour, cocoa, baking powder, baking soda, and salt.
In another bowl, whisk sugar, eggs, buttermilk, oil, and vanilla until smooth.
Gradually combine wet and dry ingredients. Slowly add hot coffee and mix until smooth.
Pour batter evenly into pans and bake for 30–35 minutes or until a toothpick comes out clean.
Cool cakes completely on a wire rack.
For the ganache, heat cream until simmering. Pour over chocolate and butter, then whisk until smooth.
Spread a layer of ganache and raspberries between the cakes.
Frost the outside with remaining ganache and decorate with raspberries.
Chill for 30 minutes before slicing for best texture.