if you're both home, and your daughter grabbed a can of pringles from the pantry (nice choice btw, I would have gone for the pringles too), how could it be just your fault?
couldn't you have asked her the same question?
"Wife, you fed our daughter pringles for breakfast?"
Obviously she would have snapped at you as well.
Remember she can be Miss Snappy all she wants, just don't reward her behavior with your attention.
And like you mentioned, even she knew not to create an argument out of nothing.
Believe it or not, some experts believe that nagging is good, somewhere deep down they care enough to nag, so when you get a chance today, you come home and hug that wife of yours with tears of joy in your eyes and tell her "thank you for caring!"
;-)
Have a good day, let me know how that "happy place" works out LOL!