My Grocery Budget Problem .... What Do You Recommend?

I have a grocery budget that I try to stick to.  Sometimes I do go over, if I find an awesome deal.  I always try to make up for it next week.  Here lately, we have been going over budget and its not my fault.  My husband likes to cook, which is great.  It is really nice to have him cook dinner especially on the weekends.  Instead of using what we have, he will make a trip to the grocery store.  He will spend $30-$40 on a meal.  It all depends on what he wants.  Don't get me wrong, I love that he cooks but his cooking is starting to cost us a fortune.

Any suggestions on what to do?