Place butter in a small bowl and microwave in 10 second intervals until the butter is melted.
Get out a large bowl and set it aside.
Place the oil and popcorn kernels in a large pot over medium-high heat.
Stir to combine.
Put a lid on the pot and cook for 1-2 minutes until popcorn kernels begin to sizzle in the oil but have not yet started to pop.
Sprinkle the sugar and cinnamon over the kernels. Give it a quick stir to combine.
Put a lid on the pot.
Swirl the pot without lifting it from the stove until kernels start to pop.
Let the popcorn pop until there’s 1-2 seconds between pops. IMMEDIATELY remove from heat.
Remove the lid and IMMEDIATELY pour popcorn into a large bowl.
Drizzle with melted butter and sprinkle with salt.
Toss the popcorn to combine.