I think the important part is to focus on not binging. Maybe start keping a journal around your binges. Ask yourself why you might be doing it. Look for a trigger. And see if you can stop the binges. For example, if you find yourself sitting there with the jar of peanut butter in hand and half of it already gone, then force yourself to go put it away.
If your focus is on "how can I exercise enough to workoff the binge?" then you are just focusing on a band-aid, and really you are leading yourself into bullimia. Because really, that is what Bullimia essentially is-- binging than purging (including through excessive exercise following the binge). I am not saying that you shouldn't work out after a binge. I just think you shouldn't focus on ways to become a better bullimic.
I have binge problems also. Long ago I began to keep a journal and starting noticing my cycle. Light eating/ maybe 700 calories a day for 4 days, then a binge day where I would consume like 3000 calories of fatty foods all in one day. Now I am working on eating more than the 700 calories a day because I am wondering if it is the deficit which is causing the binge. So, If I eat more on all days, and spread out my meals, then maybe I will not binge. I have been doing great lately NOT binging, but part of it is because I develped a dairy allergy and cannot have most of my favorite foods.
Your binges might be from different reasons than mine. I read a book once that said our body will crave foods that we need. Like if we are low in iron then we may crave iron rich foods. Maybe you are having this problem with peanut butter and nutella. Maybe there is something in them that your bodies needs more of and it is triggering the binge. Try eating well rounded meals daily-- even if you have to throw in a peanuts or peanut butter. Take a multivitamin. Focus on eating the right things everyday and enough of them. If you have to, do not buy peanut butter or nutella. Keep things out of the house that you have the most problem binging on. But don't deny yourself those things.
I wish you the best in changing your eating habits! It is very hard. I have been working on mine for years and I am still working on them! In some ways, developing my dairy allergy has been the best thing for me. LOL