What does prepared dessert gelatin contain which becomes unable to separate from the food?

Prepared dessert gelatin contains gelatin, a protein derived from collagen, which is responsible for its ability to set and become unable to separate from the food.

Here's how it works:

* Gelatin molecules have a unique structure with long chains. When they are dispersed in hot water, they unfold.

* As the solution cools, the gelatin molecules re-form and interlock with each other, creating a three-dimensional network that traps the liquid.

* This network is strong enough to hold the shape of the dessert, preventing the liquid from separating.

In addition to gelatin, prepared dessert gelatin may also contain other ingredients such as:

* Sugar: Provides sweetness and helps with setting.

* Flavoring: Adds taste to the dessert.

* Coloring: Enhances the visual appeal.

So, it's the gelatin that's the key ingredient in setting and preventing the dessert from separating, and it's the combination of gelatin and other ingredients that make up the final delicious and stable product.