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What makes marshmallows so light and melt-in-your-mouth? The secret largely lies in the tiny air bubbles trapped during whipping. These microscopic pockets create the marshmallow’s soft structure while maintaining stability. However, this airiness also makes marshmallows vulnerable to drying out—exposure to moisture collapses the air pockets, transforming the treat into a chewy, less desirable consistency.
Manufacturers constantly test each batch for elasticity and texture, ensuring every marshmallow delivers that perfect melt-in-your-mouth experience that consumers crave.