You can decorate your cake straight away, or you can make it in advance and douse with your favourite tipple. I use Shipwreck Somerset Cider Brandy in my cake. Simply store the cake and every week for up to two month, prick the top and drizzle (ginger wine, brandy, whiskey, rum or sloe gin work well too). Make sure to re-wrap the cake after every dousing of alcohol to ensure it doesn't go mouldy, store in an airtight container in a cool place.
Use your extra fondant (not the 500g you need to ice your cake) and divide into different size portions and roll each into a cone shape.
Place the thick end on a wooden cocktail stick and start at the top making small upward snips with a small pair of clean scissors rotating round until you reach the bottom.
Place your trees on their sticks into something to dry so they are stood up straight until they are fully dry.
Tip either use the bottom of a clean cardboard box or the polystyrene packaging in your parcels.
When ready roll out your 500g of fondant for icing into a square until about 3mm thick. You want it big enough to cover the top and side with extra to trim off.
Melt the jam and brush over the top of the cake.
Carefully lift your icing and place centrally over the cake and gently flatten the icing onto the cake so there are no air bubbles.
Decorate your cake with the trees, or however you wish and serve.