Why does toast not feel like toast after being out uneaten for a couple of hours?

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It just gets hard and chewy. Same thing happens if I make a toasted sandwich and wrap it up in foil, I get it out at lunch and it’s just a hard chewy sandwich rather than crispy and toasty?

In: Chemistry

3 Answers

Anonymous 0 Comments

The starch molecules crystalize after the they expel water molecules. Toasting speeds this up. The chemical process is called syneresis. If you’d like more info, google “bread syneresis”.

Anonymous 0 Comments

Toast is just bread that you dehydrated and burned slightly in a toaster.

The longer you leave toast in a moist environment, especially with moist toppings on a sandwich, it starts to absorb small amounts of water and gets kinda gummy and hard.

Anonymous 0 Comments

It’s absorbs moisture and tries to return to soft and bready but it fails to absorb enough moisture so it gets stuck halfway