Halloween is right around the corner and what better way to gain prepared than with a small candy science! M&M’s have constantly been one of my favourite candies. Let’s take it a look into the magic behind the chocolate. 

Why do M&M’s melt in her mouth however not her hand?

The answer is actually a lot simpler than you may expect and lies in the crispy street coating (CSC). This ingredient of the liquid is consisted of of just sugar and water and coats the exterior of the coco like a shell.

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" data-medium-file="https://i1.wp.com/gaianation.net/wp-content/uploads/2018/10/img_3573-e1539871727476.jpg?fit=300%2C218&ssl=1" data-large-file="https://i1.wp.com/gaianation.net/wp-content/uploads/2018/10/img_3573-e1539871727476.jpg?fit=665%2C484&ssl=1" loading="lazy" class="alignnone size-full wp-image-980" src="https://i1.wp.com/gaianation.net/wp-content/uploads/2018/10/img_3573-e1539871727476.jpg?resize=665%2C484&ssl=1" alt="img_3573" width="665" height="484" data-recalc-dims="1" />A close-up of the crispy sugar coating shellBecause the CSC is do of sugar and also water, that means it’s dissolve (dissolvable) in water (like dissolves like). So, once you pop an M&M in her mouth the street coating automatically begins to dissolve thanks to your saliva. 

Take a look in ~ this experiment below. I put M&M’s alongside one one more other in a bowl of water. Immediately the coating began to dissolve and also the shade moved right into the water. You can start to see the cacao underneath. This is specifically what’s continue in her mouth!


Now we know part of why the M&M melts in her mouth. But why not your hand?

First, think a little about the physical properties of sugar versus chocolate. We recognize that if we leave a coco bar in the sun, it will certainly melt. However, if you’ve ever made candies at residence or operated with the caramelization process, you understand it takes much more heat come melt sugar.

This method the melting point of milk coco is significantly lower than that of sugar. In fact, the melting point of chocolate is just below body temperature, an interpretation it is perfectly suitable to melt in your mouth. The crispy coating on the external can withstand the heat temperatures of her hand and also acts together a obstacle to the chocolate on the inside.

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Putting it every together


Once you ar the candy in her mouth, the street coating dissolves, together we saw in our experiment with water. The chocolate then begins to melt on your tongue as result of its low melting temperature. Try holding an M&M in her mouth for around a minute, rather than chewing, and also you’ll see specifically what i mean!

Did you know? M&M’s were an initial sold as a product for soldiers in WWII because the candy could withstand hotter climates and could be quickly transported. The idea source from the British candy Smarties.

Now the you’ve learned a small chocolate science, you are fully prepared to indulge in her favorite Halloween candy!