Like ddufore said, the accent it a flavor enhancer and since I was trying to kick this recipe up a notch I added it. I rarely use it, but I have no fear of it, it's in many commercial products. If you don't have it don't use it, I can't say it makes a difference, I'd have to do a side by side taste test for that. The two fennels is mainly because I love fennel, The cracked is for general flavor and the whole is to get a good hit of fennel every once in a while. there's no reason you couldn't just use the cracked. Please let me know how you like it bobrap.