Put ⅓ cup popcorn kernels into the paper bag. Fold down the top of the bag a couple times.
Lay bag of kernels in the microwave and set for 2 minutes. Microwave and listen for popping to slow down, about 1 pop every 3 seconds and then remove the bag of popped corn.
Spray with tamari, soy sauce, liquid or coconut aminos if desired and sprinkle with dry topping of choice. I love nutritional yeast and smoked paprika.