National Ice Cream Day was on July 19, and National Vanilla Ice Cream Day was on July 23. Now, we are heading back to the site to find out the top fast food ice cream. READ MORE: The Best Store-Bought Vanilla Ice Cream Brand is Available in MassachusettsThe author of the Allrecipes article who conducted the test shared her methodology of taste-testing fast food ice cream. I visited a variety of fast food restaurants, ordering vanilla ice cream from each to keep the tests consistent. So which fast food ice cream grabbed the #1 spot?