Heck, you can even buy a whole head of cabbage and slice it with a chef's knife if you like. (healthylivinghowto.com)
To give you an idea of the quantity of whey needed, a half a cup of whey will process a small head of cabbage and a tablespoon will process a carrot. (biomeonboardawareness.com)
One head of cabbage makes 5 - 6 single slice servings. (myrecipereviews.com)