From the company website FAQ
OUR PRODUCTS
Is your ice cream kosher?
In our SHOPS, most of the ingredients we use in our soft-serve, toppings and sauces are kosher, though not 100% of them. Our kitchens and shops are not certified kosher.
Regarding our ICE CREAM PINTS,Six of the packaged pints are OU-D kosher, certified by the Kashrut division of the Union of Orthodox Jewish Congregations of America. The pints flavors that are certified kosher: edited, Dorothy, American Globs, Birfdae Cëk, Lunchbox and Blueberry Gobbler.