Question

Function of Emulsifier in ice cream is:

• A. Limit the growth of ice crystals.
• B. Increases the growth of ice crystals.
• C. Acts as surface active agent
• D. Destabilizes the fat globule

Hint:

Although it sounds counterintuitive, emulsifiers are added to ice cream to promote fat destabilization (partial coalescence) during freezing, which is essential for a stable foam structure.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
Emulsifiers (like mono- and diglycerides or polysorbates) are surface-active agents added to ice cream mixes to control the interaction between fat, water, and proteins during freezing and whipping.

Step 2: Detailed Explanation:
- During the aging of the ice cream mix, emulsifiers displace milk proteins from the surface of the fat globules because they are more surface-active.
- This displacement reduces the thickness of the protective protein membrane, thereby destabilizing the fat globules.
- This controlled destabilization allows the fat globules to partially coalesce during whipping and freezing.
- The resulting partially coalesced fat network traps air cells and stabilizes the foam structure, giving the ice cream its smooth texture, dry appearance, and slow melting properties.

Step 3: Final Answer
The function of an emulsifier in ice cream is to destabilize the fat globules.