Yes, you can use microwavable popcorn or store bought popcorn to make Dill Pickle Popcorn. Keep in mind, microwavable popcorn and store bought popcorn can have added salt, butter or a different flavor than plain popped popcorn kernels. This can alter the taste of the popcorn. Be sure that you like the flavor of the popcorn and then add the butter dill seasoning mix and enjoy!