To test if the oil is hot enough for popping, add 3-4 popcorn kernels to the pot and cover with the lid.
Wait for these test kernels to pop. This indicates that the oil has reached the optimal temperature for popping the rest of the popcorn.
Once the test kernels have popped, quickly add the rest of the popcorn kernels to the pot and cover it with the lid.
Using hot pads, occasionally shake the pot (with the lid on) to ensure the kernels pop evenly. This process typically takes about 3 minutes, and you'll know it's done when there is about 5-7 seconds between popping sounds.
Once kernels stop popping, remove from heat and pour into large bowl or tupperware with a lid.
Sprinkle over chocolate chips, cocoa powder, and salt to taste. Immediately cover with lid and shake hot popcorn to melt chocolate and evenly coat the kernels.
Enjoy right away or transfer bowl to freezer for 5 minutes to harden chocolate.