One of Husband's research student's wives had sent me picture of a cake that looked like it was made from Lego, the boy just happened to be hanging over my shoulder and said "COOOL! That's what I want for my birthday!" Thanks Lisa!
I found the same picture on Google images but couldn't find much in the way of a tutorial so made it up as I went along. The original cake was white, but I had an excess of green icing so I decided it would be a grassy cake, then kicked myself for not thinking ahead and including his new Lord of The Rings Lego and making it all Hobbit-y!
Anyway, usual cake recipe, not as perfect ganaching as I'd hoped to make those corners nice and sharp, too sticky and not enough time to freeze it, then lots of fiddly measuring, cutting and shaping. I was very grateful to have a helper to add all the nobbly bits on the top layer of bricks, or I'd have been there all evening! Lots of figures were loaned to make the scene and Birthday Boy was very happy!
I pressed a Lego brick into the fondant to get the size and positioning right then my helper pressed out the nobby bits with this icing nozzle and we stuck them into place with a drop of boiled water.
Trickiest bit is putting that top roll of icing on without it tearing!
Aztec Guy looks more the part holding a sparkler!