Microwave. Made with real butter and jumbo popcorn. Bag becomes a bowl. Flavor with other natural and artificial flavors. 50% less fat and 25% fewer calories than regular pour over microwave popping corns. Over 40 years experience have gone into perfecting Orville Redenbacher's Gourmet Popping Corn. Continuous hybrid research and development gives our popcorn its delicious taste and superb pop-ability. And our innovative popping bag produces light, fluffy popcorn and leaves fewer unpopped kernels. One taste, and you'll know why Orville Redenbacher's earned the title Gourmet. Enjoy!