Disney says
Enjoy the ultimate comfort food enhanced with a chivalrous Spanish flair! Experience the Caliente Churro to know spice is nice—or munch to your heart’s content on the sweet and crispy Cinnamon Sugar Galaxy Churro. 
Friendliest.app says
All churro carts sell bottled beverages. If you are sensitive to any of the listed allergens, it is recommended that you purchase drinks from another location with less chance of cross contamination.

All Disney churros are purported to be produced by Tio Pepe's Churros, a J & J Snack Foods brand.

Allergy-friendly meals at Señor Buzz Churros