Split each cake in half so you should have four cake layers in total.
Place the first cake onto your cake board and spread the buttercream on top. Stack your next cake on top and spread over the buttercream. Repeat until the cake is fully stacked.
Pipe or spread the buttercream onto the sides of the cake to fill in any gaps.
Using your cake smoother smooth the sides of the cake. Don’t worry if you can see the cake through the buttercream, this is just the crumb coat. We will cover the cake soon.
When there are no gaps in your cake pop it into the fridge until the buttercream has hardened.
Once the buttercream has hardened, pipe the remaining buttercream around the sides of the cake
Using your smoother, smooth around the sides, if there are any gaps fill these with the buttercream and continue to smooth around the sides until the cake is smooth. You will most likely take some of the buttercream off the cake if you do pop this back into your bowl, we will use this later.
Add the eyes and nose to the front of Rudolph, they should have slightly dried out by now and be firmer to the touch.
Add the remaining buttercream to a piping bag and pipe it onto the top of the cake. I did a mixture of swirls and drop flowers.
Add on the antler topper, and Rudolph's ears should sit just in front of the topper. Finish with some sprinkles. You could also flick some gold paint over the top too.