Recently I was baking cookies with a couple of friends and came upon this issue...
How can cookies start out square (out of the package) and end up round?
These are sugar cookies that come pre-made. They are little squares and you just put them on the baking sheet (left photo). After a while, when the cookies are in the oven, you can see that they still have a bit of "square" in them but are becoming "rounder". Finally, you see the cookies at the very end, when they are done cooking, and they are very round.
What gives? Can some reader of this blog enlighten me of the process that inexorably moves these cookies from a square to a round traditional cookie shape?
Admittedly, not a world shaking topic, but it is good to liven things up a bit from time to time.