Flavor Science: What's Really In A Pumpkin Spice Latte

If you take a look at an ingredients list, odds are you’ll find natural and artificial flavors somewhere in there. Turns out there’s a whole science to making your pumpkin spice latte taste like pumpkin spice, or your potato chips taste like pizza.

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Sources:
The science of flavor:
http://science.howstuffworks.com/question391.htm
http://www.pbs.org/pov/foodinc/fastfoodnation_03.php
http://www.bbc.com/future/story/20140829-the-secrets-of-fake-flavours
https://books.google.com/books?id=MGXaBwAAQBAJ&pg=PA188
http://www.acs.org/content/acs/en/education/resources/highschool/chemmatters/past-issues/archive-2011-2012/flavorfulfood.html
http://health.howstuffworks.com/mental-health/human-nature/perception/taste.htm
Vanillin:
http://2013.igem.org/Team:British_Columbia/Project/Vanillin#Meeting_the_Demand_of_World.27s_Most_Popular_Flavour
http://www.sigmaaldrich.com/technical-documents/articles/white-papers/flavors-and-fragrances/natural-flavor-ingredients-regulations.html#vanillin
Grapes:
http://nadiaberenstein.com/blog/2015/3/27/from-neroli-to-nugrape-methyl-anthranilate
http://www.thetimesherald.com/story/life/2014/10/04/concord-grapes-fill-air-foxiness/16686551/
MSG:
http://www.clinicalcorrelations.org/?p=7655
http://www.smithsonianmag.com/arts-culture/its-the-umami-stupid-why-the-truth-about-msg-is-so-easy-to-swallow-180947626/?no-ist
Pumpkin Spice:
http://www.npr.org/sections/thesalt/2014/11/19/365213805/just-what-is-in-pumpkin-spice-flavor-hint-not-pumpkin