Does your kiddo love Lego Ninjago? The Lego sets and TV show are big in our house right now. And we can’t wait for the movie coming out later this year. Keep reading for an easy to follow step by step tutorial to make your own Lego Ninjago birthday cake.
This post contains affiliate links for your convenience. Click here to read full disclosure policy.
Like I said my son loves Lego Ninjago. He plays with Legos constantly and watches the cartoons. We just celebrated his 6th birthday and he requested a Lego Ninjago birthday cake. The green Ninjago Lloyd’s head to be exact. Using fondant and royal icing, I turned a simple 10” round cake into a fun birthday cake. And you can do it too! This easy Lego Ninjago cake tutorial is a great cake to get started with fondant decorating for beginners.
Here are the supplies you will need to make your own Lego Ninjago Birthday Cake:
Round Cake that has already been layered, filled and crumb coated
Black royal icing
White royal icing
Piping bag for icing
Rolling pin with bands
Edible food markers
We are starting off at just the fondant work here. This cake has already been layered, filled crumb coated and chilled. Say that five times fast! It is a 10″ Neopolitan cake (chocolate, strawberry, and vanilla) with vanilla buttercream which is a fave of my kiddo.
Make the Face:
The first step in decorating this cake is to add a yellow fondant layer just to the top. This will be the face color that peeks through the mask. To roll out your fondant, dust a fondant mat and rolling pin lightly with corn starch. This will keep the fondant from sticking. Much like flour does when rolling out cookie dough. Knead your yellow fondant a few times to get it pliable. Then carefully roll it out using the rolling pin to 1/4 inch thickness. Pick it up a few times in between rolls and turn it a quarter turn to keep it from sticking and to help the shape stay even. I find these bands that slip on the ends of my rolling pin really helpful. They ensure an even thickness when rolling out dough or fondant. It is important to not roll the fondant too thin because it can tear and also show any imperfections in the cake underneath.
A 24-ounce fondant pack is more than enough fondant to cover the top of the cake. But if you are using a smaller amount, make sure your shape is large enough to cover the top of your cake. I recommend at least 12 ounces. We will trim any excess off after smoothing it on the cake.
Now that you have the yellow fondant rolled out to 1/4 inch thickness, it needs to be transferred to the cake. Gently roll the fondant up onto your rolling pin. Then carefully unroll the fondant over the top of your iced cake.
Now, this may take some practice. Don’t give up if you have to roll it out more than once. Especially if you haven’t worked with fondant before. Take a deep breath and try again. I still make mistakes with fondant. I roll it too thin or don’t use enough cornstarch and it sticks to the board. You will start to get a feel for it the more you work with it.
With your fondant now on top of the cake, use a fondant smoother to smooth over the top of the cake, pressing just lightly enough to adhere the fondant to the frosting, but not so hard that you dent it or tear it.
My icing was not set so I didn’t need any help to get the fondant to stick to it. If your icing is set and the fondant is not sticking to it. You can use a clean spray bottle filled with water only to mist the cake lightly very lightly- or a clean paint brush to sparingly apply water to it. It only takes a little bit.
Using a sharp paring knife trim the excess fondant around the sides of the cake. Smooth the fondant again after trimming. Set the yellow fondant-covered cake aside, it is time to roll out the mask.
Make the Mask:
Now we will be using the green fondant over the yellow so that it looks like the Lego Ninjago mask. The masks on the characters have folds in them. To create the look of folds, I placed a few pieces of fondant rope across the top. To make the fondant rope, think back to your kindergarten days of playing with play dough and making snakes. Cut the rope into a few pieces. Lay a few pieces above the eye template and below. Use a bit of water on the rope to glue it in place. Check out the pictures to see how exactly to lay them out.
I made a template out of paper to set it on top of the cake. Just for reference to make sure I left enough yellow showing through and space to pipe the eyes. There is a printable below for the eyes that also includes this template.
Now it’s time for the mask! Dust your surface and rolling pin again with corn starch. Then knead and roll out the green fondant to 1/4 inch thickness just like as with the yellow. Now where the green differs is we will be cutting it and placing it onto the cake. Using a sharp knife cut a straight line through your green fondant circle. Making two pieces, one slightly larger than the other.
Carefully roll or pick up the smaller piece of green fondant. Place it over the top of the cake, above the eye template, making it curve just slightly. Then use the fondant smoother to smooth it out across the top, between the “folds” and down the sides to adhere it to the frosting just as with the yellow. Make slow swiping movements when doing this so that the fondant is smoothed and pushed down the sides and so that air doesn’t get trapped underneath and create bubbles. Guide the smoother down from the top of the cake to the sides adhering the fondant to the sides next.
Now carefully roll onto the rolling pin or just pick up the larger piece of green fondant. Place on top of the cake below the eye template. Again use the fondant smoother, to adhere the fondant to the cake and smooth out any air bubbles across the top and down around the sides.
Carefully smooth the whole cake one more time. Then use a sharp knife to trim the excess fondant from around the bottom of the cake. Try to make a nice straight cut but it is ok if this edge is a little messy, we will cover it with another length of fondant rope. Carefully smooth the top and sides again after trimming.
Now to cover up that messy edge. Knead back together the green fondant just trimmed from the cake. Then roll another fondant rope long enough to wrap around the base of the cake. Be patient and roll carefully so as not to break it. This is why this cake is good for fondant decorating for beginners. Using a fondant rope or ribbon around the bottom edge is a helpful trick when you have an edge that isn’t so pretty. It hides imperfections and adds detail.
To adhere the rope to the cake. Use a clean paintbrush or finger to brush a bit of water just at the base of the cake where the rope will be. Carefully wrap the rope around the base and smooth carefully with the fondant smoother. The water will act as a glue between the fondant. Set the cake aside and prepare to make the eyes.
Add the Eyes:
Lego Ninjago eyes are pretty simple to make. It is a circle with a thick line over the top of it the goes sort of at an angle. I didn’t trust myself to draw a perfect circle with the royal icing so I used the edible food writers to draw a guide first. Then I filled it in with black royal icing and a dot of white to give dimension. You can use a small circle cookie cutter to trace around then add the thick line above.
If you don’t want to risk piping directly onto the cake, I have included a printable template for the eyes. To use the template, place it on a cookie sheet, then place a sheet of wax paper over it. Tape the edges down with a few pieces of tape to keep it from shifting. Pipe the royal icing onto the wax paper using the template as a guide. Allow to dry completely, then carefully lift from the paper. Drying can take a few hours to overnight so plan ahead. And make a few sets just in case. Royal icing transfers can be delicate. To adhere them to the cake, just pipe a very small amount of royal icing on the back of the eye and place it on the cake. The template could be used to trace and cut the eyes out of black fondant too if you don’t want to use royal icing.
And that is how you make a Lego Ninjago Birthday Cake!
For the party, I also whipped up some sugar cookies and decorated them to look like the remaining, red, blue, white, and black Ninjago characters. You know, so Lloyd wouldn’t be lonely! These were just simple rectangle sugar cookies. I piped a yellow royal icing oval in the center of the rectangle cookie then filled in the rest of it with the color of the mask. After the icing dried I used food writers, to add random lines to make it look like the folds of the masks and also the eyes. You can find all my recipes for the cookies and royal icing and tips for decorating here.
This Lego Ninjago cake was a blast to make. My son and his party guests loved the cake and the cookies. Is your kiddos favorite character the Blue Ninjago? This cake can be adapted to whichever Lego Ninjago character you like. You could also make this cake for just a ninja birthday party. It doesn’t have to be Legos. Just change the color of the mask. Whichever Ninjago is your favorite, you have got to get your Lego Ninjago Birthday Cake on!
Click on the image below to print the Lego Ninjago Cake Tutorial eye template:
Looking for more birthday cake ideas?