Blue Bell just got another boost in its climb back to ice cream supremacy, as the FDA has officially identified a third-party cookie dough supplier as the source of Litsteria contamination that prompted a recall late last year.

The Houston Chronicle reports that the Food and Drug Administration issued a warning letter to Iowa-based Aspen Hills last month. The letter detailed the company's failures to safeguard its products from Listeria monocytogenes in four of its plants.

Aspen Hills' internal testing identified the disease-causing bacteria in ten areas and a finished batch of dough that, fortunately, was not distributed.

In December of 2016, Blue Bell announced an expansion into Denver, Colorado and surrounding cities, as well as Cheyenne, Wyoming.