Made with 100% beef & American cheese with grilled onions on our signature bun. 16 grams of protein per serving. 340 calories per serving. This product contains a bioengineered food ingredient. Fully cooked. whitecastle.com/grocery. For question or comments about this product contact us at whitecastle.com/contact-us or write to us at White Castle Food Products, LLC Attn: Customer feedback, 555 Edgar Waldo Way, Columbus, OH 43215 and attach the printed code date (example H1641105) and your proof of purchase. For additional heating methods visit whitecastle.com/grocery.