Butterfinger

Background
Butterfinger is a candy bar manufactured by Ferrero SpA, a subsidiary of Ferrero. It consists of a layered crisp peanut butter core covered in a chocolatey coating. Invented by Otto Schnering of the Curtiss Candy Company in 1923, the name of the candy was chosen by a popularity contest. In its early years, it was promoted by Shirley Temple in the 1934 film Baby Take a Bow. Butterfinger was advertised by characters from an animated sketch series on Fox's The Tracey Ullman Show called The Simpsons beginning in 1988. The animated series became a smash hit for Fox, and its characters continued to represent the candy bar in commercial advertisements until 2001.

Logo (1988-1998)
Logo: On a black background with a blue floor, We see a 3D model of a Butterfinger with a bite taken out of it with the text "Nobody better lay a finger on my Butterfinger".

Variants: Sometimes the model will change into a different model every time a different product is being advertised.
 * There is a prototype version of the logo where the text is absent and the background is black and blue gradiant
 * In the logo's final years, the Nestlé logo appears above

Tecnique: CGI animation.

Music/Sounds: Someone (mostly Bart from The Simpsons) saying the iconic line "Nobody better lay a finger on my Butterfinger!" or a variant of the line like adding "BBs" to the end (In the logo's final years, "From Nestlé" was added). The prototype variant has Bart say "It's Neat-O" followed by an announcer saying "And it's Neat-O! In the logo's final years, a 6 note jingle was added.

Availability: Can be seen on some of their Simpsons commercials in the 80s and early 90s.

Logo (1998-2001)
Logo: On a yellow background, we see a Butterfinger (or Butterfinger BBs) with the text "Bite My Butterfinger" (later "Nothing like a Butterfinger! or no text)

Technique: CGI animation.

Music/Sounds: A 7 note jingle which instruments vary on ad based on the last logo's jingle. Someone (usually Bart again) says the text above the Butterfinger and is usually followed by an announcer (or Scratchy on the first commercial to use the logo) saying "From Nestlé!"

Availability: Can be seen on some of their Simpsons commercials in the late 90s and early 2000s. Unfortunately, Butterfinger stopped partnering with The Simpsons after 13 years.

Here is a video of the commercials featuring this logo