Pepperidge Farm Bakery Classics Onion with Poppy Seeds Hamburger Buns are baked with deliberate, thoughtful care and made with premium ingredients, perfectly orchestrated with a baker's touch. The whole family will love these classic hamburger buns, sprinkled with onion and poppy seeds for added flavor. They're perfect for cheeseburgers, chicken sandwiches, barbecue sandwiches, and more.