See under wine powder.
The name (also Instant Wine) is actually not permitted, as winegrowers' associations have protested against it. In the meantime, the name "powdered drink with red wine extract" has become common. There are already many manufacturers; as an example, the ingredients of one of these products: Maltodextrin, alcohol, flavouring, sugar, red wine extract, antioxidant...
For my many years of work as an editor with a wine and culinary focus, I always like to inform myself about special questions at Wine lexicon. Spontaneous reading and following links often leads to exciting discoveries in the wide world of wine.
Dr. Christa Hanten
Fachjournalistin, Lektorin und Verkosterin, Wien