Don’t start your hob yet, keeping the pan cool will give you the best result for popcorn.
Melt your butter till its like a sauce
Now put your kernels in your pan, and add your melted butter
Give your pot a good shake making sure every kernel is coated in the butter.
Turn your hob on to a high-temperature
Now place the pan on the hob for a few mins, then lift and give a good shake to keep the kernels coated. Keep repeating this step till the first one pops.
Once the first one has popped put the lid on the pan and repeat placing it on the hob and lifting and shaking till the very last pop.