Welcome to the confusing world of carb counting!

In my Corrine Netzer book it has broad beans listed like this:

raw, 1/2 cup 6.4 carb less 2.3 fiber = 4.1 effective fiber count ( which is what we use...the carbs-the fibre)

Mature beans, boiled, for 1/2 cup are 16.7-4.6= 12.1

Doesn't make much sense does it?

If your beans are roasted, dried and crunchy snacky things, the extra carbs may come from ingredients that are added for flavouring and roasting.

Broad beans don't seem to be much of a carb bargain, even if you are using the low numbers. Corn and carrots fall into that category as well.

Is there a nutrional listing on the packet? One of the things to keep in mind is, if there is no nutrional listing on the packet, can or box, then you want to think twice about buying it. No sense in wasting money on stuff that turns out to be too high in carbs.

I know this doesn't completely answer your question.