Why do crackers have holes in them and why milk is white?

With Christmas festivities now behind us, a few common food-related questions are bound to have popped up.

Why did I eat so much? Do I really have to eat sprouts again next year? And, if I finish the tin of sweets before midnight, does my healthy New Year resolution still count?.

But this is just the tip of the iceberg.

If you have ever stopped mid-bite to question why there are holes in your crackers, then we have the answers.

Why are crackes riddled with holes?

Well, rather a finishing decorative touch, the holes in crackers ensure that the treats bake properly.

The dough used to make crackers contains lots of trapped air bubbles, and when it is heated in the oven, these pockets of air expand.

In order to stop these bubbles from expanding and bursting, a machine called a docker pricks holes in the dough to allow the air to escape.

This keeps the crackers flat and crispy, with minimal air bubbles. 

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