Nuts.
Peanuts are to be preferred to other kinds of nuts for mixing with pop-corn. Use the small, well-cleaned, roasted entire nuts with whole or medium ground pop-corn. The small quantity of nuts will make the separate pieces stand out and one poor nut spoils the appearance of the cake and box. A bad nut will make a customer refuse your brand.
Peanuts broken up or ground to the size of half a pea is suggested as one good way to use them.