I made some gate fold cards recently using this technique. They are very similar with some minor differences.
I used plain white card stock, and folded it to have a centre opening. I used a pale blue card stock to line the centre of the inside, and each side of the fold on the outside.
I made a centre medallion with a larger white background, measuring approximately 2.75 inches high and wide. The centre vellum medallion is 2.25 inches. I inked the medallion with a blend of light and darker blues, which match perfectly by change, the blue card stock on one side. After that was blended well, I turned the vellum over and stamped the snowflake on with Perfect Medium, and embossed it with a pearl powder, and then stamped and embossed the sentiment on.
Then I punched the corners out, and glued the vellum sheet onto the white stock. Then I glued the medallion onto either the right or left side of the gates - you could make them for the right or left handed of your recipients.
I lightly inked white snowflakes on the side panels to add a bit of pattern.
For the second set, I did make it the same, but I felt that the pearl powder was a bit too muted for the medallion, so I made it with a plain white embossing powder, which I felt stood out more, and a different red for the sentiment, which had a bit more glitter.
This one does stand out more, but I think I also inked the back of the vellum more as well, with the darker blue ink.
I really like how the gate fold card looks.
Here it is opening up - and on the inside, I felt just leaving the blue card stock was a bit too plain, so I added some stamping and colouring inside.
To add a bit more whimsical fun, I stamped a cute little snowman, and sentiment. I hand coloured the stampings with gel pen.
I felt they were cute and am happy how they turned out. Now the challenge is being able to remember where I store them until next Christmas!