Mix together the sugar, cocoa powder and salt in a small bowl.
1/4 cup (50 grams) granulated sugar, 5 teaspoons Dutch-process cocoa powder, 1/4 teaspoon salt
Place a large saucepan with a heavy bottom over medium heat.
Pour in enough oil to cover the bottom of the pan, and add two popcorn kernels.
1/3 cup (75 grams) popcorn kernels
Cover with a lid and wait for the kernels to pop, which should only take a couple of minutes.
While waiting, get a large bowl ready for serving.
Once those first two kernels pop, turn off the heat and add the rest of your kernels. Be careful not to overcrowd – just cover the pan’s bottom with a single layer.
Cover the pot, turn the heat back to medium, and give the pot a few shakes to let the kernels spread out. As they start popping, shake the pot back and forth so all the popcorn pops evenly.
When the popping starts slowing down, tip the lid slightly to release steam and keep shaking. Remove the popcorn from the heat after about 2-3 seconds of no popping sounds. This ensures most of the kernels have popped without risking burning the popcorn.
Place the popcorn in a large bowl and drizzle the melted butter over it.
2 tablespoons (28 grams) unsalted butter
Stir to coat the popcorn in butter.
Sprinkle the cocoa mixture over the popcorn and stir to coat it. Serve immediately.