I believe this has to do with its moisture content. While certainly dry, it still has some moisture, and what little moisture is left gets excited by the microwaves, heats up the heat helps it soften too and steams the bread essentially.
I think that MaxW's explanation of glutens for the question 'Where does the moisture come from? Note that if the bread is sufficiently dry enough, this little microwave trick wont help. It is usually advised that you add a few drops of water to the bread before heating up in the microwave in this way.
This is to ensure the bread doesn't actually become harder in the microwave, as it boils the water and will drive it off if microwaved in excess. Also, note that bread WILL become blackened, charred and start smoking if left in the microwave long enough.
I did this by typing 30 minutes instead of 30 seconds. It started smoking around 5 minutes. Sign up to join this community. The best answers are voted up and rise to the top.
Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Why does stale bread go soft in the microwave?
Ask Question. Asked 6 years ago. Active 5 years, 5 months ago. Microwave for another 5 to 8 minutes on High, until the bottom of the crust begins to become golden and the toppings and cheese are hot and bubbly. How do you make a stale loaf of bread fresh again? If you want to make stale bread soft again, wrap the bread in foil.
If the crust of the bread is very hard, sprinkle a little water on the outside before you close the foil. If you added water, heat the bread until it no longer feels soggy. Can you microwave eggs? Is Cooking Eggs in the Microwave Safe? Sometimes, microwaved eggs taste even better than stovetop eggs. Can I microwave brie?
Microwave on high for 1 minute 15 seconds, or until the brie is very soft when you prod the centre. Watch the brie as you microwave it - if it starts to puff up too much i. How do you warm up rolls? Reheat dinner rolls in the oven. Place rolls in a baking dish or arrange on a baking sheet, brush with melted butter and sprinkle with coarse salt, if desired.
Bake until warm, 7 to 10 minutes. Does keeping bread in the microwave keep it fresh? Put it in your microwave for the day. A microwave is airtight when it's closed. It works as well as a breadbox. By putting your bakery bread or rolls in there, they will remain fresher than leaving them on the counter. How do you soften hard pizza? If you're concerned about your pizza getting soggy, try putting a piece of paper towel on the plate under your pizza.
Excessive heating can lead to carbonisation or burning. In contrast, heating a slice of bread in a microwave will dry it out without achieving the surface temperatures required for the browning reactions. As well as heating only the surface of the bread, using a toaster causes the bread to lose moisture, making it dry and crispy.
In microwave heating, the starch of the bread is re-gelatinised. That is to say, the starch molecules bind to water molecules, which sort of dissolve or plasticise the starch, making the texture of the bread softer overall.
One of the properties of microwaves is that they are absorbed by water. When bread is irradiated with microwaves, the water in the bread heats up and conducts the heat to the surrounding food.
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