Delicious popcorn in 3 easy steps. ¦Step 1: Simply pour popcorn kernels into Flutter Butter using the measuring cup ¦Step 2: Turn on Flutter Butter and see it pop into action. ¦Step 3: Enjoy popcorn for a fluffy snack. 12 Months Every new Kambrook model is tested in Australia by our engineers for safety, durability and performance.   That is our guarantee.