I've been asked many times how I made this cake. The cool "kaleidoscope" effect is pretty trippy, right? Are you having a flashback to the groovy era of the 1960's? Or maybe Austin Powers comes to mind? Yeah Baby!
It's a pretty simple technique that is sure to impress.
1) Make a white cake batter...box or from scratch...doesn't matter.
2) Divide the batter evenly into 6 bowls.
3) Color each of the bowls of batter a different color of the rainbow using gel paste....I used Wilton Gel Paste in red, orange, yellow, green, blue and purple. (You could use just red and green for Christmas or pink and red for Valentine's Day, or your school colors, or pastel blue for a boy baby shower, etc.)
4) Pour the red batter in center of your pan (don't spread it with your spatula). Just let it ooze and settle. Pour the orange batter on top of the red batter and again, don't touch it with your spatula- just let it spread on it's own. Pour the yellow batter on top of the orange batter and so on....
For a cool arched rainbow effect, use a round pan and when dividing your batter, use the most batter for the red, a little less for the orange, a little less of the yellow and so on. Pour the colors on top of each other (like above #4) in the pan so that it looks like a bullseye. When you slice the cake after it's baked, each slice will look like a rainbow! Enjoy!