This was definitely an experiment. Be prepared for your house to smell like vinegar for a day or two!
I was giving this as a gift, plus I wanted to keep some for me so I doubled the recipe that I've listed. Probably also the reason it took a little while longer to dry out than the original recipe said. How cute is that little jar (Target!)? The label I made using clear circle Avery labels.
This picture was taken after about 1/2 a day - the mixture was still wet and had not started to dry out. Mine took a little over a day and half. I even took it off the original sheet after about a day and transferred it to a clean, dry plate, which seemed to help it dry out a little faster.
Makes 1/2 cup
Malt Vinegar Salt
6 tablespoons coarse salt
1 tablespoon corn starch
1/4 cup malt vinegar
Combine all the ingredients and stir. Pour the mixture onto a rimmed baking sheet and spread in an even, thin layer. Let stand at room temperature, uncovered for up to a day and 1/2.
Rake with a fork until it becomes the texture of coarse salt. Store in an airtight container for up to 3 months.
(Source: Adapted from Martha Stewart)