(transitive) To process (milk powder) into an "instant" version that is very easy for the consumer to reconstitute.
1960, Margaret Ruth Purcell, Nonfat Dry Milk Packaged for Household UseThe greater proportion of nonfat dry milk, however, is distributed by firms which buy it in bulk from manufacturers, instantize it, and either repackage it or have it repackaged for retail sale.
1984, T. P. LaBuza, ‎John W. Erdman, Food science and nutritional health: an introduction (page 318)Figure 19.4 outlines the steps in the production of dried nonfat milk showing the MCCPs and QCCPs. Of interest is the step where steam is added to instantize the product ...
