Obtained from Edit
Raspberry Bonbons can be obtained from Imp and Cherub item vendors found within Aphrodite's Realm, as well as console merchants found in the Watchtower and the Hall of Doom during the 2011 Valentine's Day Event.
"Raspberry Bonbon" is one of three Consumables that must be used in order to earn the feat Life is Like.... This feat is unique to the event and is required to earn the metafeat A Hallmark of Success.
While there was no Valentine's Day Event in 2012, this item was again available in 2013 as part of the Box of Valentine's Candy.