Cookies Amok

Lymeric based on a prompt for a contest...

There once was a baker named Smith,
And all his cookies he sniffed,
When one day to his horror,
The dough did turn sour,
Now all of his buyers are miffed!

So Smith, he ran to the grocer,
Who had, it was said, an ulcer,
The flour was sold,
Smith caught a cold
Smith no longer sniffed, oh no sir!