Why is it that when you try to re heat French fries they never turn out, especially fast food fries. But you can bake frozen fries in which have been pre fried prior to freezing yet they taste fine.
In: Chemistry
Frozen fries aren’t fully cooked yet. They’re only pre-boiled or fried a little. Baking or frying them just cooks them the rest of the way (while also thawing them). When you reheat fully cooked fries, you are in danger of overcooking them. In particular, the reheating process may end up dehydrating them.
Also, French fries are meant to be crisp, but anything crisp tends to “decrisp” over time as the crisp outside absorbs moisture (from the air or from the inside of the food), and turns soggy. You can “re-crisp” fries by baking or frying them again, but that also makes it more likely that you’ll overcook them, drying them out and/or burning them. Reheating them in something like a microwave is more gentle, but doesn’t get the outsides hot enough to crisp them up, and also will likely generate steam that only further soggifies them.
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