(But I can't see the pic of the machine...)
I usually melt the butter in a sauce pan and then pour it over pop corn that I have in a large mixing bowl and mix it with a wooden spoon.Tonight's movie was Avitar from Blu-ray with the first batch of popcorn from the popcorn popper!
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Being that I have not made popcorn like this and especially with a popcorn popper like this the finished product still needs some tweaks. I am guessing there is not a great way to spread the melted butter over the pop corn and maybe I will just nuke it in a glass measuring cup and drizzle it over the popcorn. I used 1 cup of corn to 1/3 cup of oil but had to much unpopped kernels and think I need to add a little more oil next time.