Oreo

An Oreo is a type of sandwich cookie. It consists of two round wafer-like cookies with a layer of frosting in the middle.

History
When the Simpson family were on the reality TV show The 1895 Challenge, they visited the Kwik-E-Mart. Marge wanted to buy a package of Oreos, but Apu didn't allow her to as the cookies were from 1896.

Toot-Toot gave Bart an Oreo which he ate because it was "rank".

Homer is eating Mega Stuff, a cheap version of Oreo.

Behind the Laughter

 * is a real product.
 * Oreos were actually introduced in 1912, not 1896 as Apu implies.