Sweet Cuppin' Cakes
From Homestar Runner Wiki
The first official episode, entitled Decemberween Sweet Cuppin' Cakes (or, as the toon calls itself, "Cactus Coffee and the No Tell Motel"), arrived in Decemberween In July. The email theme park refers to a "Sweet Cuppin' Cakes Land" in Strong Bad's Mount RidesPlace! USA that isn't seen. However, the email mini-golf features a miniature golf course based on the cartoon, called "Sweet Puttin' Cakes". Eh! Steve! and The Wheelchair appeared with Cheerleader, The Ugly One, So and So, and Arrow'd Guy in an extra free sample of HomestarRunner.com PAY PLUS!.
A detail that makes the "Sweet Cuppin' Cakes" characters distinguishable from others is that all the characters (except Keyboard Strong Bad and Ready For Prime Time, the ones that are based on actual characters from the Homestar Runner world) have cartoony black outlines, whereas the "real" characters have outlines a darker shade of their natural color.
The theme song appears in full only on the CD Strong Bad Sings and Other Type Hits. The guitar introduction can be heard on Main Page 18 and slightly varied in the Decemberween toon. Also, in mini-golf, a variation of the guitar line is heard along with an additional ambient synth track.