I printed out the pattern and coloured part of the cake. Then I cut and scored the lines on the pattern with a knife and folded all the score lines. I glued the coloured part on top of each layer, folded the card and let it sit overnight.
I used a Recollections punch to punch the top of the cardstock and stamped the Stampendous sentiment and sayings in Kelly Green Ink it Up! ink. It didn't come out well in the photo. I taped the card front onto a green card base.
All my stamps were from Stampendous so I assume this still qualifies for the extra entry, since the image was from the YouTube pattern.
If you are interested in the pattern you can see it on YouTube here: https://www.youtube.com/watch?v=u3YGJI4EaEY. The link to the pattern is in the comments.