What I would do would be to make a mold using a lego piece and some gumpaste or some food safe silicone. Then just press some different colored fondant into the gumpaste, trim, then apply to cake. HTH
cut base rectangles out of fondant. roll fondant into ropes the diameter you want the "bumps" on the legos to be. Put ropes in freezer. When fondant is firm cut crosswise to make all the little bumps. use a sharp knife or exacto. Freezing keeps the shape round while cutting. Attach bumps with fondant glue.
I have someone that wants a cake similar to this also (thanks for the tips!), but she wants the entire bottom tier to look like the legos and the top to be a Ninjago head. Seems easy enough but time consuming, I'm not really sure how much to charge her. Any thoughts on that? She needs it for 30 people.
I made a cake like this recently, and bought a flexible rubber form on ebay that made the shape of the Lego blocks. It cost around $20 if I remember correctly, but it sure was easy enough to use, and the blocks did look like Legos.
I made a Lego cake, I just rolled fondant to an even thickness and used a round icing tip to cut out the dots, attached to fondant rectangle with gum glue. To make the rectangles, I rolled a sheet of fondant, cut, then let it dry a bit before moving so it wouldn't stretch.
I have made several lego cakes and I am with Full House on this one. Make your proportionate rectangles and let them dry a little, then use the correct size round piping tip to make the bumps. Unless you plan on doing a lot of Lego cakes save your money and skip the mould.
Thanks everyone for all the great advice I think I will be trying to use a round tip and cut out the dots. I will let you all know how it turns out.
I also used an icing tip for mine and i believe it was the #9 Wilton tip that was the perfect size for the dots.
Here in California there are a chain of candy stores called Sweet Factory. They are usually in the malls. I bought lego candies there for a lego cake that I made. So much easier that making them!
I used a straw to cut out the dot, perfect size for mine.
i covered the entire sides of a 9" heart with legos, thank goodness only the top legos needed the dots to look real. i took fondant and made into a long rectangle shape,let dry, and then cut the appropriate size legos, and i used the piping tip to cut the nubs ontop too!
AJust an idea I've read somewhere is you could use real Legos as a mold just make sure they are clean I would buy me new ones for that