Unexpected Pattern

Dex has been suffering from a cold so a couple of nights ago, we got some wonton soup for him. Dexter likes to separate his "broth" from the "noodles" so he had a bowl of each in front of him and went back and forth eating a spoonful of broth then a spoonful of noodles.  In the midst of this he said, "Broth, noodles, broth. That's a pattern!" "That's right!" Ben and I replied.  Ben then asked him what came next in that pattern to which Dex replied without hesitation, "Ice cream sandwich".