Start by using the cut file to cut your pieces from glitter heat transfer vinyl. Be sure to mirror the mats before cutting and cut with the good side down on your mat. You can read more about the basics of cutting iron-on here. Once cut, you will need to weed away all excess from around your design as well as the centers of letters.
Then position your design on the potholder.
Remove all but one color as we are going to press one at a time. You can find the time and temperature for your EasyPress on the Cricut Heat Guide.
Locate correctly on the potholder and cover with an iron-on protective sheet or parchment paper. Then press with your Cricut EasyPress for the proper amount of time at the right temperature. Why cover with the protective sheet? I tend to do this anytime I am unsure of the base material. In this case, I didn't want to damage the potholder itself so decided to cover it.
Then peel back the protective liner. DO NOT DISCARD.
Place the next color on the potholder in place. Then return the protective sheet that you just removed. This will help protect your iron-on material.
Press then remove all of the liners to reveal your design.
Continue this process for all of the colors of iron-on. Once all colors have been pressed, turn the potholder over and press from the back according to the directions on the heat guide.