Why is the smell of baking cookies so intoxicating? What temperature do you need to bake at to get nicely browned cookies? This TED video explains it all and more.
It's a video that will please anyone interested in the chemistry of food and practical baking tips. For example, if you like cookies a little brown (and flavourful), don't follow that recipe that says to bake at 180C, because you won't get the necessary Maillard reaction. Also, use your nose — "a sensitive, scientific instrument" — to tell you when your cookies are ready.