Yes anything from NCHFP is safe as they are all lab tested recipes - well vetted and researched so safe when followed as written. You will find a few other tested and approved recipes that call for a bit less than 50/50 that are safe when used as written. Just don't try to modify them by changing the amounts called for or adding other low-acid fresh ingredients as that can put them over the line.

The 50/50 rule generally applies to evaluating the safety of unapproved, untested recipes from random sources.

Dave

Thanks Dave. Figured that was the case but wanted to make sure.

Be careful. That recipe specifies 1 1/2 quarts of vinegar, not 1 1/2 cups.

So yes, this tested recipe is less than 1:1 ratio but not nearly as low as your post indicated.

Carol

Good catch Carol!! I missed that.

Thanks Carol, I just typed it wrong. Nice to know folk here are so attentive. Thanks again.