I got the idea for these cookies from polymer clay canes, and the process is similar. These are great for a child's birthday, a spring party, or anytime a lucky or happy symbol is needed.
Step 1: Create Dough
You can use any cookie dough that's easily formed into a log. I used my brown sugar shortbread recipe, pdf file above.
I doubled the recipe, and made two logs shapes for my batch of rainbows.
Step 2: Separate & Color Dough
Portion your dough into 6 pieces, each one a bit larger than the last.
In a bowl, color each portion with paste food coloring, starting with the smallest, from purple, to blue, then green, yellow, orange and finally, red. Begin by mixing color into dough with a fork, and knead by hand if you find it easier.
Step 4: Create Color Log/Cane
Take the purple piece of dough, and form it into a small log, about 4 inches long.
Next, on a floured board, roll out the blue dough into a rectangle the length of the purple log, and wide enough to encircle it. Place the purple log on top, and roll the blue around it.
Continue the process with the different colors of dough, rolling each into progressively larger rectangles, until the log contains all the colors.
Don't worry if the log seems to get too thick, as when working with clay, you can roll it to a thinner diameter after all the layers are in place.
Step 5: Roll & Referigerate
Next, roll the log in coarse sugar, and refrigerate for at least 30 minutes.
Step 6: Slice & Bake
Slice in 1/4" to 3/8" thick slices, then cut in half, and bake per the recipe's instructions.
Step 7: Enjoy!
Look how cute! If you want the rainbows to be more uniform, you might try baking the cookies in circles, and then cutting in half while still hot from the oven.This will make the bottom edge straighter.
If you want more goodness, check out the following: