This is super easy to make... just bake the cookies and stack them together, using royal icing to keep them in place. Decorate the sides with some royal icing and add some sprinkles and colored sugar balls. TaDa... that's IT!!!
I bought those wilton stars cutters like 2 years back... and finally, i did this tree today! :D Not bad lah, I'm quite satisfied after my super long baking-break ;-)