Before getting started, grease up a 9×13-inch pan with nonstick cooking spray. This will keep your Jello from sticking to the pan.
Dump all of the Jello mix into a large bowl.
Add 2 1/2 cups boiling water to the Jello. Whisk for 3 minutes, until the Jello is completely dissolved.
Pour the Jello into a greased 9×13-inch pan, and refrigerate for 3 hours. When it’s firm and doesn’t stick to your fingers, it’s ready to cut.
Cut into whatever shapes you want, using your favorite cookie cutters. I like to lay out each Jello Jiggler on a wax paper-lined cookie sheet as I cut them..