For the icing, I used about 4 cups powdered sugar and a 1/4 cup of milk. You can add more/less powdered sugar depending on how thick you want the icing to be.
Other optional ingredients:
-Mini M&Ms (Christmas colors)
-2 rolls of Life Savers (mixed colors)
Step 1: AT-AT Body
Step 2: AT-AT Head
I attached the head piece to the body with a roll of Life Savers.
Step 3: AT-AT Legs
To create the legs, I stuck two skinny gingerbread pieces together with a life saver on the top and the middle as it's "joint". For the feet, I stacked 3 round gingerbread pieces together. You can add two short black licorice pieces on the side of the feet as well.
For some extra flare, you can even use more black licorice as a tow cable!
And that's it! May the force be with you!