Fill, crumb coat and frost your cake. You can use a 6-inch or 8-inch cake, any flavor you like for the cake and buttercream. I used some leftover buttercream from my freezer, a combination of ginger buttercream and brown butter maple, which gave it a subtle champagne color.
Place the gold sugar pearls randomly all over the cake, then toss some sparkling sugar at the cake before the buttercream crusts over. I used a combination of white, gold and silver sparkling sugars.
Fit your piping bag with a coupler and one of the piping tips, and fill with buttercream. Before you pipe the Christmas trees on your cake, I suggest practicing first on wax paper. Then you can scrape the frosting back into the piping bag to use again.
Use tip #18 to pipe the stars and shells, tip #101 to pipe the small ruffly trees, and tip #352 to pipe the leaves.
Use tweezers to place the long gold sprinkles vertically under each tree to make the tree trunks.
Keyword Christmas Cake, Christmas Trees, Gold and Green, High Altitude