(Almost) instant demi-glace store-bought stock and gelatin

These are the basic proportions multiply as needed. I start with six quarts of broth in the video and get 26 ice cubes of demi-glace, each enough to enrich a single portion of pan sauce.
1 qt (32 oz, 946mL) low-sodium broth or stock (I've had best results with prepackaged chicken broths, but…

Source: Adam Ragusea (2021-01-22)