Beer vinegar starts with beer and raw unfiltered apple cider vinegar, then sits in a covered jar for several weeks until it turns sharp and balanced. It is a simple homemade vinegar for sauces, pickles, dressings, and anywhere you want a little acidity with some beer character.
Cover the top of the mason jar with a couple layers of cheese cloth or a coffee filter and secure with the rubber band.
Place the jar in a dark and a decently cool space for roughly 4-6 weeks.
Start tasting at the 4 week mark and let sit as long as needed to get the flavor you're after. The longer it sits the better. Once the flavor is where you want it, simply place a lid over the top
NOTES
Use raw vinegar only. Raw, unfiltered apple cider vinegar gives the batch the mother it needs to turn the beer into vinegar.
Cover it with a cloth. Use cheesecloth or a coffee filter with a rubber band to let the jar breathe while it ferments.
Keep it dark and cool. Set the jar in a darker, fairly cool spot for about 4 to 6 weeks while the vinegar develops.
Start tasting at 4 weeks. Let it go longer for a sharper flavor.
Save some for next time. Hold back about 1 cup from the finished batch to start the next one with a stronger beer flavor.
Use any beer you like. Different beers will change the final flavor, so lighter and darker styles will give you different results.