Pack a pint-size mason jar with sliced 1 red onion.
Add the 1 teaspoon pickling spice, 1 teaspoon sea salt, drizzle 1 teaspoon hot honey if using.
Pour 1 cup apple cider vinegar over the onions until fully submerged.
Cover the jar and give it a quick shake to distribute everything. Let it sit at room temperature for 30 minutes. Then refrigerate for at least an hour.
Notes
Storage: Store pickled red onions in a glass container like a pint-size mason jar for up to 4 weeks. The flavor deepens the longer they sit, so they taste better overtime. Always use a clean utensil to pull more onions from the jar to prevent contamination. Helpful Tips:
Slice onions uniformly. To ensure even pickling and quicker absorption of flavors, make sure to cut the onions in even thickness. A mandoline is helpful bu not necessary.
Use a glass jar. I like using a wide-mouth, pint-size mason jar for pickling red onions since they won't react with the vinegar to preserve the taste and is the perfect size for this recipe.
Press down the onions. After pouring the vinegar, gently press the onions down with a spoon to fully submerge them. You can also add a glass fermentation weight if you have the space.
Flavor variations. Experiment with other flavorings. Try adding a smashed garlic clove, whole peppercorns instead of pickling spice, and a bay leaf or two for extra flavor.
Troubleshooting TipsMushy onions? This can happen if the onions are sliced too thin or left in the brine for too long. Try to consume within 4 weeks for best flavor and texture.
The information shown above is an estimate provided for your convenience by an online calculator. It should not be considered as a substitute for a professional nutritionist's advice. Please see our complete Nutritional Information Disclaimer.