The best tutorial I've found on this technique is here on Gina K's Stamp TV.
Here's what I learned about using the CB folder instead of the Impressabilities folder Gina uses:
Ink up the debossed side. I found that swiping the inkpad covered better than tapping.
Follow the CB instructions for running a folder through using the clear plates with this exception: Do NOT close the folder. Place a piece of shim (chipboard or rubber mat) over the cardstock then the second clear plate and run it through. That's it.
I used my finger to tap a bit more white ink onto my snowman since I wanted him to stand out.
Here's my second card. I masked off the "snow" to keep the ink from settling there. Inky fingers? Yes! After I was finished, I covered the entire card with a Golden White shimmery gloss I picked up at JoAnn's last year. It adds a a subtle sparkle that just won't photograph.
Supplies: Card 1
Paper - PTI white, Pure Poppy, Kraft
Ink - SU Craft White
Accessories - CB folder, SU markers - black, pumpkin pie, Recollections gems
Paper - Night of Navy, Blissful Blue, White
Ink - SU Blissful Blue
Stamps - Papertrey Holiday Tags
Accessories - CB folder, stickon pearls, May Arts wrinkle ribbon