I hope you're ready for the posting frenzy to continue! I've seen this technique and have been wanting to try it for some time.
I stamped the flowers and leaves in white pigment ink on the vellum and then embossed them with white embossing powder. I flipped that over and starting blending Copics. The great thing about this technique is you don't have to be that precise with your blending. Once you turn the vellum back over, it looks great!
Supplies: Stamps: In Bloom, Stylish Sentiments: Birthday
Ink: Fresh Snow
Paper: Summer Sunrise, Terracotta Tile, Vellum
Accessories, etc: White Embossing Powder, Copics