To make the snowflakes, melt the white melting chips according to the package instructions.
Pour into a disposable piping bag and cut the tip off.
Line a cookie sheet with parchment paper and pipe 10 snowflakes in different sizes.
Leave to dry overnight or up to 24 hours.
To make the reindeer ears, roll out the chocolate fondant and cut out two medium hearts. Set aside.
Roll out the white fondant and cut two small hearts.
Place the white hearts onto paper towels and spray with edible gold mist.
Apply a little water to the brown hearts to stick the gold hearts on top. Pinch at the bottom to form the ears.
Place on a parchment lined cookie sheet and leave to dry in a cool, dry place (not the fridge as this can make fondant go sticky) overnight or up to 24 hours.
To make the antlers, roll out the chocolate fondant and use a template (6"/15cm) to cut out the antlers using a small sharp knife.
Place on a parchment lined cookie sheet and leave to dry in a cool, dry place (not the fridge as this can make fondant go sticky) overnight or up to 24 hours.
When the antlers are dried, melt the white melting chips according to the package instructions
Pour into disposable piping and cut the tip off.
Pipe some snow drips on the antlers and sprinkle some white sugar crystal sprinkles on top. Brush away any excess that falls onto the antlers. Leave to dry.
To make the reindeer nose, roll the red fondant to about half-inch thick and use the circle cutter to cut out the nose. Leave to dry with the antlers and ears.
To make the cake layers, preheat oven to 18C/350F/Gas 4 (or to the temperature on the cake mix box) and spray the cake pans with baking spray.
Make the cake batter according to the package instructions using the quantities of eggs, water, and oil indicated on the box.
When combined, divide the cake batter between two bowls. Color one bowl of cake batter red, and the other one green.
Using two ice cream scoops, alternating red and green cake batter between the cake pans to create a marbled effect.
Bake for time indicated on box or until a toothpick comes out clean.
Allow to cool in pan for 5 minutes then remove from pan and transfer to a wire rack to cool completely.
When the cakes have cooled use a cake leveler to remove the domes of the cake to make them even.
To make the chocolate frosting, using an electric mixer beat the butter and cream cheese until combined and smooth. Gradually mix in the cocoa powder.
Very slowly, beat in the powdered sugar until combined.
Whisk in the cream until the frosting is smooth and fluffy.
Scoop 1 cup of frosting into a large piping bag fitted with a medium star tip and set aside.
To frost the cake, place one layer of the cooled cake into the middle of a cake board. Use a little frosting on the base of the cake to keep it in place.
Use an ice cream scoop to place 4-6 scoops of frosting onto the first layer of cake and spread out evenly with a spatula.
Add the second cake layer and repeat with more frosting.
Add the final layer of cake and cover the cake completely with frosting. Use a spatula to smooth the surface all the way around.
To pipe the reindeer mane, use the reserved chocolate frosting in the piping bag and pipe a large swirl at the front and center of the cake. Add more swirls of varying sizes on the top and down the side of the cake - use the photo as a guide, but you can pipe however you like.
Place the dried fondant ears on the top of the cake and place the antlers behind the ears.
Carefully remove the white chocolate snowflakes and place randomly over the mane
Use the black frosting tube fitted with a round tip to pipe the eyes onto the front of the cake.
Pipe a dot of the frosting onto the back of the dried red fondant nose and stick to the front of the cake.
Use the white frosting tube fitted with a round tip to pipe white dots around the hair for snow and sprinkle with the white sugar crystal sprinkles.
Use the green frosting tube fitted with a leaf tip to pipe holly leaves around the cake, then use the red frosting tube fitted with a round tip to pipe the holly berries.