Why does food become soggy after heating in the microwave oven, particularly pas…

Why does food become soggy after heating in the microwave oven, particularly pastry?

A normal oven heats foods by exposing them to hot air and thermal radiation. It cooks the foods from the outside in. As a result, a normal oven tends to make the surfaces of food dry and crispy because it heats those outer surfaces first and drives the water out of them. A microwave oven heats the food by heating the water in that food. It cooks foods from the inside out. As a result, a microwave oven tends to drive water out of the middle of the food and into the outer layers of that food. The outer layers are essentially “steamed” and steaming makes everything soggy.

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