That's what on the Menu of the Polar Express
When my wife was pregnant with our 2nd child she craved Dairy Queen Blizzard almost every night. One night when she wanted me to go, it was 15 minutes after Dairy Queen closed. We settled on a McFlurry which just isn't the same. With that in my head and reading "Prehistory of the Far Side" and Gary Larson talking about the cardinal sin of drawing "Penguins with Polar Bears" this joke was born.