I'm really kind of surprised that everyone's immediate answer is to either lock up food or punish the whole family....that wouldn't work at my house!She is old enough to understand consequences, so talk to her. Not just once, but as often as you have to. Don't be mean or condescending, but try to get down to her level and get her to open up....what no one here has suggested yet is finding out WHY she does it!!!Also, try to reason with her and help her choose better alternatives. Encourage her to come to you when she's hungry, and tell you put you have to really be patient and not get angry with her, it's going to be time consuming and aggrivating, but let her come to you when she's hungry and FIND something that you can both agree on...that may be the best place to start!It's not GOING to become a big problem, it ALREADY IS!! If you have access to other diplomatic family members, have them try to talk to her as well, or consider talking extensively to your pediatrician or a therapist.Keeping less junk food in the house is great for her, and everyone, but you can't just eliminate it and punish everyone either, there has to be a middle ground. Sometimes even just finding alternatives that are also appealing are good as well, but still I say again...WHY??? Until you understand they logic behind it nothing is gonna help!Is she really still hungry??? Is she bored? Is she wanting attention? Is she having problems with a friend/neighbor/school/family member?? Most kids don't just "do" things like that, they are compensating for something else....and it isn't necessarily your fault!!Punishment and reward systems can work well also, if done correctly. You can't make it SO hard to get a reward that it's unreasonable. Maybe do something like a sticker chart, and every day that she eats something healthy for meals/snacks she gets a sticker, and after 5 stickers she gets a small toy/extra TV time/stay up late....NOT FOOD REWARDS!!! lolthen the next week, make it 10 stickers, or something that will get her a small reward every couple of weeks.You could also take a look at your own habits and see.....is she copying your or your husband's bad habits? I know that used to be the case at our house. When I stopped to think about how often I was just casually snacking on chips, candy, soda etc in front of my kids, I realized how bad it was, and I talked to them about the changes I was going to make and that we were going to try to do it as a family. It's not easy, but it's really going pretty well, though it's taken some time!If nothing helps, do seek help from your pediatrician and check that there is not something amis with her blood sugar levels, thyroid levels, etc. that cause her to "crave" these things (I see you mostly list highly sugared items that she's sneeking?)BEST OF LUCK TO YOU!!!!!!!!!!!

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