I just saw an episode of The Grim Adventures of Billy and Mandy on Netflix where Irwin was walking down the street in the middle of the night saying, "A quart of milk, a loaf of bread and a stick of butter" which similar to the classic animated skit, "A loaf of bread, a container of milk and a stick of butter" from Sesame Street. Not exactly a Muppet reference, but something that Muppet fans are familiar with nonetheless.