a melted ice cream stain in front of a soda machine in Houston attracted pilgrims when people noticed that the stain kinda/sorta looked like the Virgin of Guadalupe.
Corpus Christi Caller-Times - Jan 14, 2000
Some analysis from an article by J. Rhett Rushing ("Homemade Religion: Miraculous Images of Jesus and the Virgin Mary in South Texas") that appeared in 2001: A Texas Folklore Odyssey
For more dogmatic Catholics and most Protestants, periodic updates and reminders from major religious figures are just not part of their world. In South Texas, however, the largely Hispanic and Catholic population seems quite eager to accept the near-weekly images, apparitions, and miracles that pop up as reminders of religious intent and markers of faith.
Unsettling to the Catholic clergy and other, more formal religious folks, these widespread images of religious figures are not only immediately accepted by some of the local believers, but in fact, are quite expected.. . .
At a southside Houston apartment complex in February of 2000, I witnessed a "folk mass" of nine women praying, taking a version of communion, and supplicating themselves to an image of the Virgin that miraculously appeared in a melting ice cream spill next to the laundry room's Coke machine. Later interviews confirmed that the group had no leader and certainly no church sanction for their activities, but as Maria B. explained, "When the Virgin comes to see you, you don't wait for the priest."
Maria's remark seems to be the mantra for South Texas Hispanic Catholics. Historically underserved by the Catholic Church, religion for many was learned and practice at the altarcitas and grutas of the family.
San Francisco Examiner - Jan 14, 2000