The following is the e-mail response from Jack in the Box when asked which of their menu items are vegan:
Thank you for your e-mail. To get a complete listing of our product ingredients, please visit our website at www.jackinthebox.com. Click on ?Our Food? then go to the left side of the screen and click on ?Ingredients? Ingredients are listed in alphabetical order. If you’re not sure what is in the product that you want the ingredients for, check ?Product Build? or use the ?Build A Meal? nutrition calculator.