\There is a video here about the technique. You just use punches in the same color as the background and it looks embossed but it isn't.
The stamp used is from Stampin Up. The snowflakes were done with a Cuttlebug die and embossed in a Cuttlebug folder.
Today I did another card using the technique. This time I used a new cupcake punch. I have wanted the punch for a long time and happily got it on Thanksgiving day. The stamps are from Stampin Up. I colored it with Copic markers.