For the cake:

1. Preheat the oven to 350°F (180°C) and grease a 6 or 8-inch (15-20 cm) non-stick round pan and a muffin tin (for 1 muffin only). Set aside.
2. In a small bowl, mix all-purpose flour, cocoa powder, baking powder, and salt. Set aside.
3. In a large mixing bowl, whisk eggs, sugar, buttermilk, vanilla extract and vegetable oil until combined. Add the dry ingredients to the wet ingredients.
4. Pour the batter into a muffin tin filled until two thirds, then pour the remaining batter into the prepared round pan.
5. Bake for about 20 minutes for the muffin and 45-50 minutes for the cake, or until a toothpick inserted into the center comes out clean. Remove from the oven and let cool completely.
6. Once cooled, trim the top part of the cake so it is flat, then invert the cake upside-down onto a cake stand***.

Icing and icing decorations:

1. Chocolate icing: For the chocolate icing, place chocolate and butter into a bowl. Add water to a saucepan, place bowl on top and heat in a water-bath, whisking constantly until smooth and shiny. Remove from heat, whisk in the whipped cream, then place it back on low heat and whisk until it thickens a little. Use immediately or the icing will harden.
2. House roof: Brush the cone with the chocolate icing in a thin layer. Add candy eyes, then transfer to a plate and place in the refrigerator until set.
3. Grave + Door + Shutters: Cut Milano biscuits to create the grave, the house door and the shutters. Cover the grave and the main door with chocolate icing, and stick the shutters to the door, using chocolate icing as a glue. Place in the fridge to set. Once chocolate has hardened, use white icing pen to write R.I.P with on the grave, and draw a cross on the door to create the windows.
4. Cake + Muffin icing: Cover the top of the muffin with chocolate icing, place the ice cream cone on top and stick it onto the cake.
5. Now cover the sides of the cake with the remaining chocolate icing, using a large icing spatula. Place in the refrigerator until set.
6. When icing is set, place the muffin on top of the cake, then draw a few spider webs, using the white icing pen.

Other cake decorations:

1. Ghosts: Transfer marshmallow cream to a piping bag and pipe a few ghosts onto the cake. It’s ok if their shape is more or less spread out. Don’t forget to add candy eyes!
2. Cocoa soil + Fence: Mix biscuit crumbs with melted butter and cocoa, and crumble it over the cake in front of the grave and all around the cake.**** Add Pretzel sticks to create the grave fence, the house arms, and that’s it!