How to do embossed knitting?

I don’t really know if that’s even the correct term for it , but I am trying to replicate a christmas stocking and as you can see in the attachment, the white part of the candle is a little bumpy and raised up from the rest of the stocking. Does anybody know how to replicate this?

It’s called Swiss Darning.
or
Duplicate Stitch.

More instructions.