Cook for about 1 minute ... When making the caramel coated popcorn, to clean your pan, pour in some boiling water. Return the pan to the hob or oven, if needed, to dissolve the caramel.
Dried corn kernels are readily available from most supermarkets. Commercially-produced ready-to-cook popcorn kernels are also available, sealed in bags that you just put in the microwave.