From 911truthandcookies.org:

Carol Brouillet, longtime 9/11 Truth activist and radio personality, brought delicious nut cookies and chocolate chip cookies to a 2009 Citizen Summit in Denver. Her Aunt Frances' recipe attracted even the most 9/11-truth-fearing attendees…So we decided to "re-brand" the 9/11 truth movement under the banner of 9/11 Truth and Cookies. This slyly equates 9/11 Truth with milk! And 9/11 Truth is like mother's milk, capable of restoring a wounded in-denial America to health.
…
The Physics of 9/11 Truth and Cookies!
1. Even in our message-saturated world, nobody can ignore a sign saying "9/11 Truth and Cookies"
2. Most people will fall for cookies at nearly free-fall speed.
3. Nobody can say "9/11 Truth and Cookies" without a grin. Humor can help us through the pain of overcoming denial.

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References

Time Magazine: http://www.time.com/time/magazine/article/0,9171,1901491,00.html
YouTube: https://www.youtube.com/watch?v=osRdela9JeI
KALW News: http://kalwnews.org/blogs/producer/2011/03/21/hundreds-gather-un-plaza-protest-eight-years-iraq_901380.html
StumbleUpon: http://www.stumbleupon.com/url/911truthandcookies.org/
DudeLOL: http://dudelol.com/911-truth-and-cookies/