Cheddar, parmesan, romano & swiss cheeses and creamy whipped potatoes. Contains a bioengineered food ingredient. Made in batches. Established 1952. Contains bioengineered food ingredient. Be inspired! Fulfill your foodie side and share our delicious and easy-to-prep recipes. Featured Recipe: Philly cheesesteak pierogies. www.mrstspierogies.com. Twitter. Pinterest. Facebook. Instagram. For more information, call toll-free 1-800-Pierogy (743-7649).