Here are no-bake cookies sitting on cereal box wax paper (and evidence that a chubby toddler hand swiped some cookies)
And layers of chocolate chip cookies separated by cereal box wax paper:
Cereal box wax paper is what I usually use first, because I don't have to wash it once it's used. But we don't buy that much store bought cereal, so when we run out of cereal box wax paper, I get out the sheets that I bought for my dehydrator, which double nicely as re-usable wax paper. They clean off nicely and can be used over and over again.