Cheddar, parmesan, romano & swiss & asiago cheeses and creamy whipped potatoes. Contains a bioengineered food ingredient. Ready to cook. Made in batches. Established 1952. Be inspired! Fulfill your foodie side and share our delicious and easy-to-prep recipes. www.mrstspierogies.com. Twitter. Pinterest. Facebook. Instagram. 1-800-Pierogy (743-7649).