The phrase "gelatinous mixture" refers to a thick and jelly-like substance that is formed when certain ingredients or substances combine together. Full definition
It contained a gelatinous mixture of truths, half - truths, and no truths. (firstthings.com)
Chia seeds are often eaten raw, but can also be soaked in liquid to form a gelatinous mixture. (rabbitfoodformybunnyteeth.com)
In the conventional view, oysters build their houses by secreting a gelatinous mixture of organic molecules from their mantle, the layer of skin that coats the inside of their shells. (sciencemag.org)