system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What's the difference between white and brown sugar, and why does more brown sugar make cookies so much softer?
gpt
White sugar is brown sugar after being processed to take molasses out of it. Originally, brown sugar came first, but most commercial brown sugars are actually made from adding molasses back in to the white sugar, rather than just leaving it in its first stage. Probably because it's easier/cheaper for a company to get a hold of white sugar post-processing than to nab it in its raw form.

Brown sugar makes things softer because the added molasses adds moisture to the baked end result.