how to make a flocked christmas tree

I recently saw a video of a woman using a mixture of cornstarch and wallpaper glue for her Christmas tree. I’m looking for a cost-effective way to use it. Snowflake powder is quite expensive on Amazon in the US, plus shipping and import fees. Will the method described work? Although the woman said “cornstarch,” I think she meant cornstarch because it’s yellow. I’ve never used wallpaper glue, so I don’t know how she’ll get results.

I don’t think it’s very sustainable.