pspondylitis,
I can only sit here in awe reading this:
It is very likely that only little vanilla powder would be used in cookies ( and does vanilla powder have starch, Google it, many seem to be crushed pure vanilla ?).
Therefore, even tiny amounts of gluten can harm the gut in celiacs ( similar to those with nut allergy, one nut or hundred nuts do not make any difference, both amounts can kill).
Granted, two different entities, but it is confounding that these statements appear as part of the same argument.
Additionally, Google (or any other search engine) doesn't trump everything. That vanilla powder could very well have had something starchy added to it, therefore the sensitive individual reacted.
Make sure your bacon doesn't have some sort of starchy additive. That will stifle your progress, no doubt. The grapes may be problematic too if you are sensitive to sugar. A dash of humility may not be a bad addition though.
